The post collision velocity of the bawling ball is 2.35 m/sec, if the mass of the bowling ball is 88 kg and the mass of the pin is 0.95 kg.
The law of conservation of momentum will be used here to determine the post collision velocity of the ball.
Mass of the bowling ball, M₁ = 88 kg
Mass of the pin, M₂ = 0.95 kg
Before collision velocity of the ball, v₁ = 2.41 m/s
Let the post collision velocity of the ball = v₃
Pre-collision velocity of the pin, v₂ = 0
Post collision velocity of the pin, v₄ = 5.19 m/sec
By the law of conservation of momentum,
M₁v₁ + M₂v₂ = M₁v₃ + M₂v₄
88 × 2.41 + 0.95 × 0 = 88 × v₃ + 0.95 × 5.19
v₃ = 2.35 m/sec
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3. A 3-kg block moving 4 m/s to the right collides with an 8-kg block moving 2 m/s to the left.
a) If the two blocks stick together, what is the final velocity?
b) If the two blocks collide elastically and the 3-kg block moves to the left at 1 m/s, what is the final velocity of the 8-kg block?
c) How much kinetic energy is "lost" in the collision in a)?
The momentum in a collision is conserved. From this, the final velocity of the coupled mass is 2.5 m/s. The final velocity of the 8 kg mass will be 3.1 m/s in the elastic collision.
What is elastic collision ?In elastic collision, the total kinetic energy of the system is conserved. Hence, the initial kinetic energy of the colliding system is equal to the sum of their final kinetic energy.
Given m1 = 3 kg
u1 = 4 m/s
m2 = 8 kg
u2 = 2 m/s
v be the final velocity of the coupled mass.
then, m1 u1 + m2 u2 = (m1 + m2) v
(3 kg × 4 m/s) + (8kg × 2 m/s) = (8 kg + 3 kg)v
v = 2.5 m/s
If the blocks are moving in opposite direction after collision, then the velocity of 8 kg mass is calculated as follows:
(3 kg × 4 m/s) + (8kg × 2 m/s) = (3kg × 1 m/s) + (8 kg × v2)
28 kg m/s - 3 kg m/s = 8 v2
v2 = 3.1 m/s.
The change in kinetic energy for the in elastic collision is given as:
ΔKe = m1(u1)² + m2(u2)² - (m1 + m2)v²
= (3 kg ×16 m²/s²) + (8 kg× 4 m²/s²) - (8 kg + 3 kg)6.25 m²/s²
= 11.25 J.
Therefore, the kinetic energy lost in the inelastic collision is 11.25 J.
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Express the force as a Cartesian vector. F 750 N Prob. F2-17
A force vector with magnitude 750 N and angle 30⁰ can be written as a Cartesian vector as: F = 375√3 i + 375 j
A vector can be written as its x-component and y-component.
Suppose the angle of a vector F with the positive x-axis is θ, then its components are given by:
Fx = F cos θ
Fy = F sin θ
Then,
F = Fx i + Fy j
= F cos θ i + F sin θ j
In the given problem, θ = 30⁰, F = 750.
Hence,
Fx = 750 cos 30⁰
= 750 (1/2)√3 = 375√3
Fy = 750 sin 30⁰
= 750 (1/2) = 375
Thus, the vector can be written as a Cartesian vector:
F = 375√3 i + 375 j
Your question is incomplete, most likely your question was:
Express the force as a Cartesian vector. F 750 N. The angle of the force vector with the horizontal is 30⁰.
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Part C Find the average momentum density (momentum per unit volume) in the light at the floor: Express your answer in kilograms per square meter second: Azd kg/m? Submit Request Answer
The average momentum density in the light at the floor without additional information such as the intensity, wavelength, and area of the light.
To find the average momentum density (momentum per unit volume) in the light on the floor, we would need additional information such as the intensity and wavelength of the light, as well as the area of the floor that the light is illuminating.
The formula for momentum density is given by p=I/c where I is the intensity of the light, c is the speed of light, and p is the momentum density. Without this information, it is not possible to provide an accurate answer for the average momentum density in the light on the floor in kilograms per square meter per second.
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Question 3(Multiple Choice Worth 5 points) (01.01 MC) Read the story description and historical context for the short story "Rules of the Game" and answer the question. Story Description: "Rules of the Game" tells the story of a girl who lives in San Francisco's Chinatown. She learns the strategies of chess but struggles to see eye-to-eye with her mother—possibly her wisest opponent and best teacher. In chess and in life, there are rules and choices. What's your next move? Historical Context: As a result of wars, famine, and political oppression, Chinese immigration to the United States dates back to the mid-1800s. Chinese immigrants came to the United States looking for better economic opportunities so they could provide for their families and send money to their relatives back home. San Francisco became a hub of Chinese culture; however, immigrants still faced many challenges like reduced wages, long work hours, and discrimination. Select the detail that supports the idea that Chinese immigrants were
Chinese immigrants sent money to their relatives back home.
Who are Chinese Migrants?Chinese immigrants were having a hard time in "china", not the USA, the Chinese father or mother sent money, from America, to china, because china was having a hard time, this also making the Chinese come to america.
Chinese immigration to the US has a long and occasionally contentious history. Due to organized labor lobbying and anti-Chinese sentiment, Congress passed the Chinese Exclusion Act in 1882, which virtually ended the immigration of Chinese workers.
On the other hand, the 1965 reduction of obstacles for non-European immigrants to the United States, as well as improving U.S.-China ties and China's relaxation of emigration rules in 1978, were game changers for growing immigration.
Therefore, Chinese immigrants sent money to their relatives back home.
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4. a 1000 kg sports car moving at 20 m/s crosses the rounded top of a hill (radius of 100 m). determine a) the normal force on the car, b) the normal force on the 70 kg driver, and c) the car speed at which the normal force equals zero.
The normal force on car is 62167 N.
Given information:
mass of car m(car) = 1000kg
speed of car v = 20m/s
radius of path r = 100m
mass of driver m = 70kg
The weight of the car and driver
a) W = (m (car) + m) g
= 10496.7 N
The centripetal force of applied to the car and driver.
F(c) = ( Mcar + M) V²/R
The expression for the force balance along the normal direction is:
W = N - F(c) --------------------equation1
N = 62167 N
b) The weight of driver is:
N = W - mv²/r
= 406.7 N
c) From the equation 1, if normal force is zero.
v² = rg
By putting value in this equation
v = 31.32 m/s
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In an orbiting spacecraft, you are handed two identical closed boxes, one filled with sand and the other filled with feathers. How can you tell which is which without opening the boxes
By observing both boxes in a microgravity environment we can deduce which box has feathers and which one has sand.
What is microgravity?
Microgravity is a condition in which the gravitational force experienced by an object is much weaker than the gravitational force experienced on the Earth's surface. It is characterized by a very small or negligible acceleration due to gravity. Microgravity can be found in environments such as orbiting spacecraft, the International Space Station, or high-altitude balloons.
In an orbiting spacecraft, where there is no gravity, you can tell which box is filled with sand and which is filled with feathers by performing a simple experiment.
Hold one of the boxes in one hand and the other box in the other hand.Release both boxes simultaneously.Observe the motion of the boxes.In a microgravity environment, both boxes will float in the air, but the box filled with sand will have more inertia and will tend to move less than the box filled with feathers due to their difference in mass. The box filled with feathers will have a lower mass and will be more affected by air resistance and other perturbations, thus moving more in the spacecraft.
Therefore, you can tell which box is filled with sand and which is filled with feathers by observing their motion in a microgravity environment without opening the boxes.
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a bright line spectrum contains a line with a wavelength of 518m. determine the wavelength in meters
The wavelength of the light is rise to to 518 ×10⁻⁹ m. The recurrence of the shinning line is break even with to 5.79 × 10¹⁴ Hz. The color of light is yellow within the obvious range.
What are recurrence and wavelength?
The recurrence can be depicted as the number of motions of a wave in one moment and has S.I. units of per moment or Hertz.
The wavelength can be illustrated as the separate between the two adjoining focuses in stage w.r.t each other and includes a unit of meters.
The relationship between recurrence (ν), wavelength (λ), and speed of light (c) can be composed as follows: c = νλ
Given, the wavelength of the line, λ = 518 nm = 518 ×10⁻⁹ m
The speed of light is rise to to: c = 3 × 10⁸ m/s
The recurrence of the shinning line can decide from the above-mentioned relationship:
ν = c/λ = 3×10⁸/ 518 ×10⁻⁹ = 5.79 × 10¹⁴ Hz
Therefore, the recurrence of the shinning line is break even with to 5.79 × 10¹⁴ Hz. The color of light is yellow within the unmistakable spectrum.
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. a roller-coaster car moves ft horizontally and then rises ft at an angle of above the horizontal. it next travels ft at an angle of downward. what is its displacement from its starting point? use graphical techniques.
171 feet at an inclination above horizontal. then rises ft at an angle above the horizontal. it next travels ft at an angle of downward
What is its distance from its beginning point, according to the image?The displacement is only the difference between the locations of the two and is unrelated to the route used to get there. The length of the path between the two markings, however, is the distance traveled.
How do you detect displacement, and what is it?The term displacement refers to a shift in an object's position. It has a magnitude and direction and is a vector quantity. For instance, if an object shifts from location A to position B, its position changes. use graphical techniques.
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a pitot-static probe can often be seen protruding from the underside or side of an airplane. as the airplane flies, the probe measures relative air speed. what type of measurement is this?
This is a measurement of relative air speed, also known as true airspeed.as the airplane flies, the probe measures relative air speed. what type of measurement is this.
What is airspeed?
Airspeed is the speed of an aircraft relative to the air through which it is moving. It is typically measured in knots, nautical miles per hour (knots), or kilometers per hour (kph).
Airspeed is important for pilots to know in order to safely and accurately navigate the airspace. An aircraft's airspeed has an effect on its performance, such as the rate of climb or descent, rate of turn, and stall speed. Airspeed is also important for aircraft designers, as it can affect the aerodynamic performance of the aircraft.
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A small body A starts sliding from the height h down an inclined groove passing into a half-circle of radius h/2 (figure shown above). Assuming the friction to be negligible, find the velocity of the body at the highest point of its trajectory (after breaking off the groove).
When body A slides down the inclined groove, it gains potential energy due to its height, which is converted into kinetic energy as the body moves down. The body will continue to gain kinetic energy as it slides down the half-circle due to the conservation of energy.
The velocity of the body at the highest point of its trajectory can be calculated by using the conservation of energy principle. The initial potential energy of the body at height h is converted into kinetic energy as the body moves down. At the highest point of its trajectory, the kinetic energy is equal to the initial potential energy.
Initial potential energy = mgh (where m is the mass of the body and g is the acceleration due to gravity)
Kinetic energy = 1/2 * m * v^2 (where v is the velocity of the body)
The velocity of the body at the highest point of its trajectory can be calculated by equating the initial potential energy and the kinetic energy, and solving for v:
mgh = 1/2 * m * v^2
v^2 = 2gh
v = √(2gh)
Therefore, the velocity of the body at the highest point of its trajectory is √(2gh).
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The electric potential along the x-axis is V =200x2V, where x is in meters. What is Ex at x =0m?Express your answer as an integer and include the appropriate units.
The electric potential along the x-axis is V =200x2V, where x is in meters.-1200volt/m is Ex at x =0m.
What is electric potential ?
The electrical potential difference is also referred to as voltage. Electric potential difference serves as a gauge for the effort a unit charge makes to transfer from one point in an electric field to another. The term "voltage differential" is frequently used to refer to an electric potential difference.
What is electric field ?
The force per unit charge that is applied to a positive test charge that is at rest at that site is defined by mathematics as the electric field, which may be connected to each point in space and is represented as a vector field. An electric field can be created by either an electric charge or by magnetic fields that change over time.
V=200x2
E=-dV/dx=-400x=-400*0=0.(part A)
E=-dV/dx=-400x=-400*3volt/m=-1200volt/m.
Therefore, electric potential along the x-axis is V =200x2V, where x is in meters.-1200volt/m is Ex at x =0m.
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What is the smallest height needed to make a wave?A. 6 feetB. 90 millimetersC. 20 millimetersD. any height
D. Any height. Wave height is determined by the amount of energy that is present in the wave and the distance between the wave crests. As long as there is energy present in the wave, it can form regardless of its height.
What is energy?Energy is a fundamental concept in physics, and is defined as the capacity for doing work. It can be transformed from one form to another, and is found in many forms such as thermal, kinetic, electrical, chemical, nuclear, and gravitational energy. Energy is found in the environment, in living things, and in the conversion of one form of energy to another. It is the driving force behind all physical, chemical, and biological processes. In the world of physics, energy is the ability to do work. It manifests itself in a variety of forms such as light, heat, electrical, gravitational, and chemical energy. Energy is never created or destroyed, but it can be converted from one form to another. The total amount of energy in the universe is constant and never changes, but it can be changed from one form to another. It is essential for life, as it is used to power everything from growth and development to communication and transportation.
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Why is it important to include a section on your procedures and methods, as well as the materials you used, in a laboratory report about an experiment?
a.so readers know that your hypothesis was correct
b.so you don’t have to provide as much information about the results
c.so the experiment can be replicated by other scientists
d.so you can do the experiment more cheaply later
c. so the experiment can be duplicated by other scientists. It includes detailed information about the procedures used in an experiment, as well as the materials used. It is important because it allows other scientists to repeat the experiment to confirm the results.
Why is it an important part of scientific process?This is a crucial part of the scientific process and helps to establish the validity and reliability of the results. Having a clear and detailed record of the experiment also ensures that it can be repeated in the future, and provides a basis for further research and experimentation.
What are scientific methods of experimentation?he scientific method is a systematic and objective approach to solving problems and answering questions through empirical observation and experimentation.
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for a 1.00 m (100 cm) crumple zone, how much deformation do you think is needed in order to keep the passenger the safest?
For a 1.00 m (100 cm) crumple zone, about 200 kN of deformation is needed in order to keep the passengers safest.
What are crumple zones?Crumple zones, also known as crush zones or crash zones, are structural safety features used in vehicles, primarily in automobiles, to extend the time before a change in velocity and consequently momentum results from the impact during a collision by means of a controlled deformation.
In recent years, they have also been added to trains and railcars. As the average force delivered to occupants is inversely proportional to the time over which it is applied, crumple zones are intended to extend the duration over which the overall force from the change in momentum is applied to a person.
The equation for the impulse here is:
F Δt = m Δv
where, v is the velocity and m is the mass.
The survival rate of dummy experiments shows about 90% for a 1 m crumple zone. Hence, a deformation of 200-300 kN is needed to keep the passengers safest.
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The vernier caliper reads a distance of ___O 3.07 cm. O 3.50 cm. O 3.70 cm. O 3.97 cm.
The vernier caliper reads a distance of 3.07 cm. So option A is correct.
The Vernier caliper is a precision measuring instrument that is used to measure internal and external dimensions with high accuracy. The vernier scale allows for measurements in increments that are smaller than the smallest division on the main scale.
Additionally, the object being measured should be securely held in place and parallel to the jaws of the caliper. The reading on the vernier scale is then combined with the reading on the main scale to give the final measurement.
In the case of the question, the reading is 3.07cm, but it's important to note that without more information about the context of the measurement, the reading could be different.
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A bicyclist rides 5.2 km due east, while the resistive force from the air has a magnitude of 3.4 N and points due west. The rider then turns around and rides 5.2 km due west, back to her starting point. The resistive force from the air on the return trip has a magnitude of 2.8 N and points due east.
The work done by resistive force from starting to return of the trip is -27.04KJ
What exactly is a resisting force?The resistance to movement is caused when two objects rub against one another is called friction. Friction occurs whenever two items come into interaction with one another. Friction acts in the exact opposite direction from the motion and works against it. The two surfaces' respective materials have an impact on how much friction exists.
d1 = 5.2km east ; d2 = 5.2 Km west
f1 = 2.4N ; f2 = 2.8N
Work done = F.s => F scosФ
Ф => Angle between force and displacement
W1 = f1 d1 cosФ
=> 2.4 x 5200mx cos180
=> - 12.480KJ
W2= f2 d2 cosФ
=> 2.8 x 5200m x cos180
=> -14.56KJ
Total work done => W1 + W2 = - 12.480KJ + (-14.56KJ)
=> -27.04KJ
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a ball is thrown directly up from a height of 0m with an initial speed of 2m/s. calculate the height of the apex of the throw. (section 3.9.)
A ball is thrown directly up from a height of 0m with an initial speed of 2m/s. The height of the apex of the throw is 0.897 meters.
What is Initial speed?Initial speed refers to the velocity or rate of motion of an object at the beginning of a period or the start of a specific event. It is typically represented by the symbol "u" and is measured in units of distance per time, such as meters per second (m/s). The initial speed of an object can be determined by measuring its position at the beginning and end of a period and using the formula: speed = distance/time.
The height of the apex of the throw can be calculated using the following equation:
y = vi*t + (1/2)gt^2
where,
y = height of the apex (in meters)
vi = initial velocity (in m/s) = 2 m/s
t = time of flight (in seconds)
g = acceleration due to gravity (in m/s^2) = 9.8 m/s^2
Since the ball is thrown directly upwards and the initial velocity is given, we can use the following equation to calculate the time of flight:
t = 2*vi/g
Substituting the given values, we get:
t = 2*2/9.8 = 0.408 seconds
Now we can substitute the calculated value of t and the given value of vi into the first equation to get the height of the apex:
y = vit + (1/2)gt^2
y = 20.408 + (1/2)9.80.408^2
y = 0.816 + 0.081 = 0.897 meters
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describe a way you can use the information from the video to determine whether the ball is moving with a truly constant velocity.
the video data to determine whether the ball is moving with constant velocity write whether you believe the ball is slowing as it approaches the can: Use evidence to back up your claim: B I U 6 = = = 8 D fx.
Velocity is a vector measurement of motion's rate and direction. Simply put, velocity is the rate of movement in one direction. Velocity can be used to calculate the speed of a car traveling north on a major highway and the speed of a rocket launching into space.
The velocity vector's scalar (absolute value) magnitude, as you might expect, is the speed of motion. Velocity is defined as the first derivative of position with respect to time in calculus. A simple formula involving rate, distance, and time can be used to calculate velocity.
Though they represent different measurements, speed, velocity, and acceleration are all related. Take care not to confuse these values.
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Three charges are in a straight row. the first charge has a value of 5.00 x 10-5 c. the second charge also has a value of 5.00 x 10-5 c and is 2.50 cm to the right of the first charge. the third charge has a value of -2.50 x 10-5 c and is 2.00 cm to the right of the second charge.
The net force on the first charge is 3.04 × 10⁴ N.
What is the electric?Electricity is a form of energy generated by the movement of electrons through a conductor, such as a wire. It is a versatile and powerful form of energy that can be used to power a variety of devices, from household appliances to entire cities. It is also essential to many modern technologies, such as computers, mobile phones, and medical equipment. Electricity is an essential part of our daily lives and has become an integral part of modern society.
a) F[tex]_{net}[/tex] = F₁₂ + F₁₃
[tex]$= \frac{(9 \times 10^9) \times (5 \times 10^{-5}) \times (5 \times 10^{-5}) }{(2.50 \times 10^{-2})^2} + \frac{(9 \times 10^9) \times (5 \times 10^{-5}) \times (2.50 \times 10^{-5}) }{(4.50 \times 10^{-2})^2}[/tex]
= 3.04 × 10⁴ N
Thus, The net force on the first charge is 3.04 × 10⁴ N.
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Full question:
Three charges straight in a row. The first charge has a value of 5.00 x 10-5 C. The second charge has a value of 5.00 x 10-5 C and is 2.50 cm to the right of the first charge. The third charge has a value of -2.50x10-5 C and is 2.00 cm to the right of the second charge. a. Find the net force on the first charge.
30 J of work are done in 15 econd to puh a bowl of fruit horizontally. What wa the power delivered completing thi tak?
The power delivered in completing this task is 2,400 W.
What is power?Power is the ability or capacity to do or act. It is the capacity to influence others through either force or authority. Power is derived from a variety of sources including physical strength, political authority, and social status. Power can also be used to create, maintain, and change systems of behavior, thought, and belief. Power can be seen as an influence that one person or group has over another, with the capacity to make decisions and influence outcomes. Power can be used to accomplish both positive and negative goals. Ultimately, power is a tool that can be used to bring about change in the world.
Power = Work / Time
Power = 30 J / 15 s
Power = 2,400 W
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a test of the prototype of a new automobile shows that the minimum distance for a controlled stop from 90 km/h to zero is 54 m. find the acceleration, assuming it to be constant as a fraction of the free-fall acceleration. the acceleration due to gravity is 9.81 m/s 2
A fraction of the free-fall the acceleration due to gravity acceleration of the car is -0.64525g .
Why gravity is a force?However, in the broader sense, gravity is indeed a force because it describes the resulting interaction between two masses. Gravitational effects are fundamentally caused by the warping of spacetime and the motion of objects through the warped spacetime. However, the end result is as if a force was applied.
Is gravity 9.8 m?Gravity is measured by the acceleration that it gives to freely falling objects. At Earth's surface the acceleration of gravity is about 9.8 metres (32 feet) per second per second. Thus, for every second an object is in free fall, its speed increases by about 9.8 metres per second.
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a constant force applied to a 2.0 kg object at rest moves it 4.0 m in 2.0 seconds. what impulse was applied?
A constant force applied to a 2.0 kg object at rest moves it 4.0 m in 2.0 seconds. The impulse of the force applied is 4kg m/s.
What is Impulse?
Impulse is a term which is used to describe or quantify the effect of force which is acting over time to change the momentum of an object. Impulse is represented by the symbol J and it is usually expressed in the SI unit as Newton-seconds or kg m/s.
Impulse = Change in momentum = ΔP
Momentum = m × v
ΔP = mv -mu
ΔP = 2.0 × 4/2 - 2.0 × 0
ΔP = 2.0 × 2 - 0
ΔP = 4kgm/s
The impulse of force applied is 4 kg m/s.
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a 10.9 g bullet leaves the muzzle of a rifle with a speed of 527.5 m/s. what constant force is exerted on the bullet while it is traveling down the 0.7 m length of the barrel of the rifle?
The constant force is exerted on the bullet while it is traveling down the 0.7m length of the barrel of the rifle is 2166.42N
Given the mass of bullet (m) = 10.9g = 10.9 x 10^-3kg
The speed of bullet (v) = 527.5m/s
Length of barrel of rifle (d) = 0.7m
From Newtons laws of motion we know that F = ma where F is the force and a is acceleration and also v = at where t is time
The distance travelled = d
d = 1/2at^2 = 1/2a(v/a)^2 = v^2/2a
a = v^2/2d
Then F = ma = mv^2/2d
F = 10.9 x 10^-3 x ( 527.5)^2 / 2 x 0.7 = 2166.42N
Hence the constant force that is exerted on the bullet is 2166.42N.
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1. What is the speed of each seat? Answer in units of m/s.
2.If a child of mass 35.2 kg sits in a seat, what is the tension in the chain (for the same angle)? Answer in units of N.
( 1) The speed of each seat is 6.73 m/s
( 2 ) The tension in the chain is 327.6 N.
What is he speed of each seat?The speed of each seat is determined by treating the system as a simple harmonic motion.
Apply the law of conservation of mechanical energy as shown below.
kinetic energy of each seat at the bottom = potential energy of each seat at the top
K.E = P.E
¹/₂mv² = mgh
v² = 2gh
v = √ ( 2gh )
where;
h is the vertical displacement of the childreng is acceleration due to gravityThe vertical displacement of the seats is calculated from the length of the chain as follows;
h = L cos (24.4)
The speed of each seat is calculated as follows;
v = √ ( 2g L cos (24.4) )
v = √ ( 2 x 9.8 x 2.54cos (24.4) )
v = 6.73 m/s
The tension in the chain is calculated by applying the formula for centripetal force as follows;
T = mv²/r
where;
m is the total mass suspended by the chain = 10 kg + 35.2 kg = 45.2 kgv is the speed of each seat = 6.73 m/sr is the radius of the platform = (12.5 m) / (2) = 6.25 mT = ( 45.2 x 6.73² ) / ( 6.25 )
T = 327.6 N
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The complete question is below:
An amusement park ride consists of a rotating circular platform 12.5 m in diameter from which 10 kg seats are suspended at the end of 2.54 m massless chains. When the system rotates, the chains make an angle of 24.4° with the vertical. The acceleration of gravity is 9.8 m/s^2.
1. What is the speed of each seat? Answer in units of m/s.
2. If a child of mass 35.2 kg sits in a seat, what is the tension in the chain (for the same angle)? Answer in units of N.
describe how you might use the color of a galaxy to determine something about what kinds of stars it contains.
The color of a galaxy can be used to determine something about what kinds of stars it contains by looking at the relative amounts of blue and red light.
How does the chemical composition of a galaxy relate to its color?The chemical composition of a galaxy is closely related to its color because the color of a galaxy is determined by the types of stars it contains. Galaxies that contain mostly young, hot, and blue stars will appear blue, while galaxies that contain mostly older, cooler, and red stars will appear red. The presence of elements such as hydrogen, helium, and oxygen can also affect a galaxy's color. For example, galaxies that contain high amounts of these elements tend to have more star formation, leading to a higher number of blue stars, and as a result, a bluer galaxy. The chemical composition also affects the brightness of the galaxy, with the galaxies that contain higher amounts of heavy elements tend to be brighter.
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variations in the density of the earth's crust do not affect the value of the gravitational constant g at all. true false
The given statement is false, variations in the density of the earth's crust do not affect the value of the gravitational constant g at all.
What's the density of the Earth's crust?When compared to oceanic crust, which is basaltic (i.e., richer in iron and magnesium than granite) and has a density of about 2.9 to 3 grammes per cubic cm, continental crust is generally granitic and has a density of about 2.7 grammes per cubic cm.
The Earth has a density of 5.513 g/cm³. This represents the planet's entire material on average. Since water is less dense than iron, an average is required for usability.
G's value is independent of the types and dimensions of the bodies. Furthermore, it is independent of the type of medium separating the two bodies. Because of this, G is known as the universal gravitational constant.
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4) a very elastic rubber ball is dropped from a certain height and hits the floor with a downward speed v. since it is so elastic, the ball bounces back with the same speed v going upward. which of the following statements about the bounce are correct? (there could be more than one correct choice.) a) the ball had the same momentum just before and just after the bounce. b) the magnitude of the ball's momentum was the same just before and just after the bounce. c) the ball's momentum was conserved during the bounce. d) none of the above statements are correct.
When dropped from a specific height, a very stretched rubber ball hits the ground quickly to the left. The elastic nature of the ball causes it to rebound with
What has Elastic been famous for?
Elasticsearch, the centerpiece of the Elastic Stack, a collection of free and open technologies for data intake, enrichment, storing, analysis, and visualization, is renowned for its straightforward REST APIs, decentralized nature, speed, and scalability.
Where can you find elastic?
Designed to feel soft on the skin, cord elastic is frequently used in clothes that doesn't need as much stretch as well as in jewelry making. It's a fantastic choice for doll clothing or baby garments because of its tiny size. Often, cord elastic is used.
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what is the weight of an object in pounds that has a mass of 49 slugs? round your answer to three significant figures.
When the mass is 49 slugs, the item weight 407.68lbf.
What is a weight example?The International System of Units (SI) defines the newton as the unit of force, which is used to measure weight. For instance, a kilogram of matter weighs around 9.8 newtons on Earth's surface and roughly one-sixth as much on the Moon.We can not convert Kg to Newton, because Newton is a unit of Force whereas Kg is the unit of mass respectively.One newton is equal to 1 kilogram meter per second squared
Mass = m = 49 slugs
g=8.32ft/[tex]s^{2}[/tex]
To find weight:
Weight = mg
W = 49*8.32 ft/[tex]s^{2}[/tex]
W= 407.68
W= 407.68lbf
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The complete question is :
what is the weight of an object in pounds that has a mass of 49 slugs when g is 8.32 ft/[tex]s^{2}[/tex]? round your answer to three significant figures.
how far from the center of the stick must the rope be attached in order to maintain rotational equilibrium?
To balance the stick, the rope has to be closer to a heavier side of the block in order to maintain rotational equilibrium.
Rotational equilibrium: What Is It?Rotational equilibrium, If all of the torques working on an item are equal to zero, then the item is in rotational equilibrium and its angular momentum remains constant. If an object is hung out of its center of gravity or if its gravity centers falls below the suspension point, then the item will be in equilibrium.
What elements impact the equilibrium of rotation?A body must not be experiencing any angular acceleration and must have a net torque of zero in order to achieve rotational equilibrium. To maintain a body in rotational equilibrium when a torque is acting on it, an opposite and equal offset torque must be delivered to the body.
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a 1.50-kg cannon is mounted on top of a 2.00-kg cart and loaded with a 57.7 gram ball. the cannon, cart, and ball are moving forward with a speed of 1.17 m/s. the cannon is ignited and launches a 57.7 gram ball forward with a speed of 53.8 m/s. determine the post-explosion velocity (in m/s) of the cannon and cart. enter a negative value for a backward velocity and a positive value for an forward velocity.
the post-explosion velocity (in m/s) of the cannon and cart, is u = -o.9m/s
The displacement that an object or particle experiences with respect to time is expressed vectorially as velocity. The meter per second (m/s) is the accepted unit of velocity magnitude (also known as speed). Alternately, the magnitude of velocity can be expressed in centimeters per second (cm/s).
Let u be the cannon and cart's post-explosion velocities.
The law of conservation of momentum states that
(m₁ + m2)u + m3v = 0
Thus
u = - M3 /m1 + m₂ v =
Consequently, u = -(0.057 / 1.50 + 2.00) 53.8 = 0.876
u = -0.9m/s
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