The net force on the mass in the vertical direction is
∑ F = n - w = 0
and the net horizontal force is
∑ F = A - f = ma
where
n = magnitude of the normal force
w = mg = weight of the mass
m = 10 kg, mass of the … uh, mass
g = 9.8 m/s², mag. of acceleration due to gravity
A = 69 N, mag. of the applied force
f = mag. of kinetic friction
From the first equation, we get
n = mg = (10 kg) (9.8 m/s²) = 98 N
Then the friction force has magnitude
f = µ n = 0.5 (98 N) = 49 N
Solve the mass's acceleration in the second equation:
69 N - 49 N = (10 kg) a
a = (20 N) / (10 kg) = 2.0 m/s²
in the positive x direction.
Answer these questions correcty first who answers it all correct gets cash
Answer:
I am extremely sorry, but I cannot answer your questions, because there aren't any.
Explanation:
I don't see any questions, or else my eyes are not working properly.
A speed boat travels 200 miles at a speed of 20 miles/hr. How much time will it take to
travel the 200 miles?
Answer:it will take 10 hours
Explanation: The way we get this answer is if the boat travels 200 miles at 20 mph that means that every 20 miles the boat traveled an hour would pass. Using this we can see that 20 fits into 200, 10 times, meaning that the time it would take to travel would be 10 hours.
The time it will take to travel 200 miles is 10 seconds
The calculation can be done as follows
= 200/20
= 10 seconds
Hence the amount of time it will take the speed boat to travel 200 miles is 10 seconds
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The greater a wave's amplitude, the___ energy the wave carries.
A: less
B: neither of these
C: more
Answer:
C) more
Explanation:
because the amplitude of a wave is the maximum displacement of a particle from its rest position, thus, the more energy there is, the higher the particle is displaced
hope this helps, if not, please report it so that someone else can try it
The greater a wave's amplitude, the more energy the wave carries. The correct option is C.
What is amplitude?
Due to the fact that the amplitude of a wave represents the maximum displacement of a particle from its rest position, the higher the displacement of the particle, the more energy there is.
The maximum displacement or distance made by a point on a vibrating body or wave relative to its equilibrium location is known as the amplitude in physics.
The wave's deviation from its mean position is referred to as amplitude. It measures the vertical separation of the peak (also known as the crest or trough) from the mean position. The distance between the center line (or the still position) and the top or bottom of a wave's crest or trough is known as the amplitude.
Therefore, the correct option is C: more.
To learn more about amplitude, refer to the link:
https://brainly.com/question/8662436
#SPJ2
How does the mother get nutrients and oxygen to the embryo?
Answer:
Oxygen and nutrients from the mother's blood are transferred across the placenta to the fetus through the umbilical cord. This enriched blood flows through the umbilical vein toward the baby's liver. There it moves through a shunt called the ductus venosus. This allows some of the blood to go to the liver.
ill mark as brainliest if given the option
Answer:
[tex]36 g/cm^{3}[/tex]
Explanation:
In order to find the density, the problem says we need to find the volume first.
Since we know that the sample of gold is a perfect cube, we know that the side lengths will all be the same. Since all the side lengths will be 3, we can take that value and cube it to find the volume.
[tex]3^{3} = 27[/tex]
Now that we know the volume is 27 cm³, we can solve find the density.
[tex]Density = \frac{Mass}{Volume}[/tex]
[tex]Density = \frac{972g}{27cm^{3} } = 36 g/cm^{3}[/tex]
Therefore, the density of the sample is 36 g/cm³.
State Newton's first law of motion
Answer:
His first law states that every object will remain at rest or in uniform motion in a straight line unless compelled to change its state by the action of an external force. This is normally taken as the definition of inertia.
Explanation:
Answer:
It states that: If a body is at rest or moving at a constant speed in a straight line, it will remain at rest or keep moving in a straight line at constant speed unless it acted upon by a force
Explanation:
1. Al descomponerse su vehículo una persona tira de su auto con la ayuda de una cuerda con una fuerza de 3500 N que forma un ángulo de 45° con la horizontal. Calcula las componentes horizontal y vertical de dicha fuerza
Responder:
Fy = 2474,8737
Fx = 2474,8737
Explicación:
Dado que :
Dado:
Fuerza, F = 3500 N
Ángulo formado con la horizontal, θ, = 45 °
Los componentes de una fuerza se pueden descomponer en componentes verticales y horizontales.
El componente vertical Fy; y
El componente horizontal Fx
Fy = Fuerza * sinθ
Fy = 3500 * sin45 °
Fy = 2474,8737
El componente horizontal:
Fx = Fuerza * cosθ
Fy = 3500 * cos45 °
Fy = 2474,8737
1) A tourist accidentally drops a camera from a 50.0 m high bridge. What is the speed of the camera as it hits the water? *
2) Determine the total displacement of a car that is initially at 10 m/s but then accelerates at 2 m/s^2 for five seconds. *
3) A car travels down a long straight road at 20 km/h for 0.60 h. How far does the car travel during this interval? *
4) A skateboarder slides down a ramp starting from rest and moving to 10 m/s in 12 seconds. How far will the skater travel during this time interval?
5) A runner travels south along a straight path for 5.5 h with an average velocity of 1.75 km/h, then travels south for 7.5 h with an average velocity of 0.90 km/h. What is the hiker’s displacement for the total trip? *
6) A runner accelerates from rest for 3.2 seconds. If the runner travels 24.6m, what is the runner's acceleration? *
7) A car moving at 5 m/s accelerates at 0.2 m/s^2 for one minute. How fast is the car moving? *
Can someone please answer these questions for me :))
Question:
1) A tourist accidentally drops a camera from a 50.0 m high bridge. What is the speed of the camera as it hits the water? *
Answer:
28.0 m/s
The height has a
distance of 5
meters if it takes
2.5 seconds to
hit the ground
what is Gravity?
Answer:
2.6
Explanation:
7 times
PLEASE HELP DUE TODAY!
How does the mass of a moving object affect the amount of kinetic energy it has? Describe the evidence you need to collect to test your prediction, and include a reason why you think this evidence is necessary.
Answer:
Since the Kinetic energy forumla is K=(1/2)mv^2 if you double the mass the kinetic energy of the object also doubles. for example if your object has a mass of 3 and a velocity of 2 then its K.E. equals 6, if you then double its mass the kinetic energy now equals 12. A good analogy would be something like a bowling ball, if you throw a 12 pound ball at the same speed as a 6 pound ball, the force from the 12 pound ball would be exactly double to the 6 pound ball.
Explanation:
man, english isnt my strong suit. you have all you need here to make a A level answer just fix grammar as needed. I cant imagine this is a high level physics class so in reality just make it so it would be plagirsm detected.
Also a side note this may help you in the future. if u double its velocity its K.E. actually quadruples since V is squared.
Ram has power of 550 watt. What does it mean?
An object moves with a constant speed of 20 m/s on a circular track of radius 100 m. What is the tangential acceleration of the object?
Answer:4s^-1
Explanation:Tangential Acceleration=v^2/r=(20)²/100=400/100
1. A car is slowing down at a constant rate from 40 m/s to come to a stop. The acceleration is - 5 m/s2. How
much time will pass before the car is at rest?
Answer:
Explanation:
drop a paper a piece of thermocol and a piece of plastic from a height of 10 to 15 feet not the time for each object to hit the ground why does paper take more time than thermocol and thermocol more than the plastic piece make the paper to fell down in such a way that it should hit the ground before all of them and how does it happen
Answer:
Explanation:
According to Newton's law of gravitation , all objects should take same time to fall from same height , but it does not happen when we see a paper , a thermocol and a plastic paper to fall .
It happens due to air resistance . In case of paper , this is most pronounced , so it falls slowest . In case of plastic paper , the resistance is least so it falls fastest .
If we squeeze the piece of paper to make a lump so that it does not remain flat , it will fall the fastest , because in this case the air resistance on it becomes the least .
A force of 50 N begins to move a block of wood weighing 100 N on a
rough horizontal surface. Find the coefficient of static friction
Answer:
0.5
Explanation:
From the question given above, the following data were obtained:
Force (F) = 50 N
Weight (W) = 100 N
Coefficient of static friction (μ) =.?
The coefficients of static friction (μ) is simply defined as the ratio of force (F) to the normal reaction (N). Mathematically, it can be expressed as:
μ = F / N
With the above formula, we can obtain the coefficient of static friction as follow:
Force (F) = 50 N
Weight (W) = 100 N
Coefficient of static friction (μ) =.?
μ = F / W
μ = 50 / 100
μ = 0.5
Thus, coefficient of static friction is 0.5
EARS: Two ears (E) is dominant to one ear (e). Both parents are heterozygous.
Answer:
what's the question
Explanation:
I don't understand the question
Time and velocity are both vectors T/F
A ramp is used to lift a box into a truck. The distance it is lifted is 1.5m. The box has a mass of 5kg. What amount of work must be completed in order to lift the box?
Answer:
The work completed is 73.5 Joule
Explanation:
Mechanical Work
Mechanical work is the amount of energy transferred by a force that moves an object by a certain distance. It's a scalar quantity, with SI units of joules.
Being the force and the displacement the work is calculated as:
W=F.s
The box of m=5 kg is lifted by a distance of s=1.5 m. The force applied to lift the box is equal to the weight of the box, assuming it's lifted at a constant speed, thus:
F = mg = 5 * 9,8 = 49 N
The work is:
W = 49 N * 1.5 m
W = 73.5 J
The work completed is 73.5 Joule
A force of 25 newtons east and a force of 25
newtons west act concurrently on a 5.0-kilogram
cart. What is the acceleration of the cart?
A. 0 m/s2
B. 0.20 m/s2 east
C. 1.0 m/s2 west
D. 5.0 m/s2 east
Answer:
0
Explanation:
the forces gets cancelled off. hence when applying F=Ma, F=0 therefore a=o
The acceleration of the cart is 0m/s². Option A is correct.
According to Newton's second law of motion:
[tex]\sum F=ma[/tex]
m is the mass of the object
a is the acceleration
If a force of 25 newtons east and a force of 25 newtons, then the sum of force is expressed as:
[tex]\sum F = 25 - 25 =0N[/tex]
Get the acceleration
[tex]a=\frac{\sum F}{m} \\a=\frac{0}{5} \\a=0m/s^2[/tex]
Hence the acceleration of the cart is 0m/s²
Learn more here: https://brainly.com/question/24175401
What might a scientist who studies thermodynamics experiment with in order to better understand cold
Answer:
A scientist who studies thermodynamics might experiment with the instant ice packs where you have to pop a bag on the inside to create a chemical reaction to make it cold.
Which observation supports a model of the nature of light in which light acts as a wave?
A. Blackbody radiation
B. Photoelectric effect
C. Constructive interference
D. Temperature change
Answer:
A) Blackbody radiation
Explanation:
i just took the test and this was my answer
Answer:
constructive interference
Explanation:
just did it
Describe the sequence of mechanical energy events that lets you hear the
muffled sound of a radio from inside your neighbor's closed house.
Answer:
Starting from the beginning.
There is a radio signal that is received by the radio.
The radio interprets the signal and produces a current in response to it.
That current goes to a membrane that oscillates producing sound, the oscillation of the membrane is the first mechanical energy event here.
These oscillations can travel in material mediums, for example, the air. Then there is a production of waves (soundwaves) that travel in the air (second event).
Those waves now hit the wall that separates you and your neighbor, as the wall is made of a material, the soundwaves can travel through it, but they will be dispersed (a part of the waves rebounds on the wall, and another part is dissipated as the wave travels through the wall), there is also a transmitted part of the wave, that is now in your house. (this change of medium will be the third event). Now only the lower frequencies survive, this is why the sound is "muffled".
Those remaining frequencies now travel in your house, and when they reach your ear, your ear sends a signal to your brain and your brain interprets them as sound. The wave interacting with your ear will be the fourth and last mechanical energy event.
Can y’all help me with Number 3 please for right now
The number of planets, besides the earth, that are visible to the unaided eye is
How will increasing the frequency of this wave affect the wavelength?
Answer:
Show the wave
Explanation:
Answer:
The number of complete wavelengths in a given unit of time is called frequency (f). As a wavelength increases in size, it's frequency and energy (E) decrease. From these equations you may realize that as the frequency increases, the wavelength gets shorter. As the frequency decreases, the wavelength get longer.
Explanation:
I majored in Physics
3. A car has a mass of 2.50 x 10^3 kg. If the force acting on the car is 7.65 x 10^3 N to the
east, what is the car's acceleration?
Answer:
3.06m/s² to the east
Explanation:
Given parameters:
Mass of car = 2.5 x 10³kg
Force acting on the car = 7.65 x 10³N
Unknown:
Acceleration of the car = ?
Solution:
From Newton's second law of motion:
Force = mass x acceleration
Acceleration = [tex]\frac{Force }{mass}[/tex] = [tex]\frac{7.65 x 10^{3} }{2.5 x 10^{3} }[/tex] = 3.06m/s² to the east
If Steve throws a football 40 m and it travels for 3 seconds, what was the balls velocity?
Answer:
13.4 m/s^2
Explanation:
40 divided by 3 equals 13.3 repeating.
A car accidently volls of f a cliff a is leaves the cliff has a horzontal velocity of 13m/s if hits the ground 6am from the share line calculate the heigh of the cliff
Complete question :
A car accident my rolls off a cliff as it leaves the cliff it has a horizontal velocity of 13 ms it hits the ground 60 m from the shoreline calculate the height of the cliff
Answer:
104.59 m
Explanation:
Given that:
Horizontal Velocity = 13 m/s
Horizontal distance = 60 m
To obtain the height of the cliff :
We use the Relation :
S = ut + 0.5at²
t = time ; u = initial velocity ; S = height
To obtain t ;
Speed = distance / time
Horizontal distance / speed = time
Time = 60 / 13
Time = 4.62 seconds
The height of cliff :
u = 0
Hence ;
S = ut + 0.5at²
S = 0 + 0.5(9.8) * 4.62^2
S = 104.58756
Height of cliff = 104.59 m
What pattern did you observe when the tape was at
different distances from the Van de Graaff machine?
PLS HELP
Define Simple harmonic motion (SHM). A body moving with SHM has an amplitude of 10 cm and a frequency of 100 Hz. Find (a) the period of oscillation (b) the acceleration at the maximum displacement (c) the velocity at the centre of motion.
Answer:
Explanation:
Simple harmonic motion is the motion that involves the cyclic and periodic motion of an object about a central point or equilibrium position, due to the effect of a restoring force, such that the object has the same maximum displacement during its motion on either side of the equilibrium point
(a) The parameters of the body moving with SHM are;
The amplitude of the motion of the body, a = 10 cm
The frequency of the complete cycles of the motion of the body, f = 100 Hz
The period of the oscillation, 'T', is the time it takes o complete one cycle
T = 1/f
∴ T = 1/100 Hz = 0.01 seconds
(b) The acceleration, a = -A·ω²·sin(ω·t)
Where;
One complete oscillation is given as ω·t = 2·π
Therefore at either end at the maximum displacement, which is at either end of the equilibrium position is reached at half a complete cycle, or ω·t = 2·π/2 = π
At the maximum displacement a = -A·ω²·sin(ω·t) = A·ω²·sin(π) = 0
Therefore, we have;
The acceleration, of the body at the maximum displacement, a = 0 m/s².
