The correct option is B. Her trajectory will her center of mass be 1.0 seconds later at the apex.
[tex]V = V_0 - g*t[/tex]
where,
[tex]V_0 = initial velocity[/tex]
acceleration due to gravity = 9.8 m/s^2
t = 1.0 seconds
substituting the above values in the equation;
[tex]V_0 = 9.8 m/s + 9.8m/s^2*1.0 sec\\V_0 = 19.6 m/s[/tex]
**Hence after 1.0 sec the gymnast would almost reach 19.6 m as distance.
According to the trajectory of mass thrown uniformly,
[tex]H_(max)= v^2/ 2*g = 19.6^2/2*9.8 = 19.6 m[/tex] ----> indicates the mass reaches the peak after a time of 1.0 seconds
Speed is the directional velocity of an item in motion as an indication of its price of exchange in the role as located from a selected frame of reference and as measured through a specific widespread of time (e.g. 60 km/h northbound). speed is a fundamental concept in kinematics, the branch of classical mechanics that describes the motion of our bodies.
Velocity is a physical vector amount; both value and route are had to outline it. The scalar absolute value (magnitude) of velocity is referred to as pace, being a coherent derived unit whose quantity is measured in the SI (metric system) as meters according to 2nd (m/s or m⋅s−1). as an example, "five meters per 2d" is a scalar, while "five meters in keeping with 2d east" is a vector. If there may be a change in velocity, course, or both, then the object is said to be present process an acceleration.
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Complete Question:
If a gymnast leaves the ground with a vertical velocity of 9.81 m/s when doing a back flip, where in her trajectory will her center of mass be 1.0 sec later? Show the equation applied!
a) Approaching the apex
b) at the apex
c) descending from the apex
d) on the ground
e) not enough information
according to the universal law of gravitation, the force due to gravity is:____.
According to the universal law of gravitation, the force due to gravity is directly proportional to the product of the masses of two objects and inversely proportional to the square of the distance between them.
Explain universal law of gravitation?The force of attraction between two objects caused by their masses is described by the universal law of gravitation, a physical principle put forth by Sir Isaac Newton. This law states that every particle of matter attracts every other particle in the cosmos with a force that is directly proportional to the product of their masses and inversely proportional to the square of their separation.
The equation provides the law's mathematical expression:
F = G * (m1 * m2) / r^2
Where r is the distance between the centers of the two objects, m1 and m2 are their masses, and G is the gravitational constant.
The gravitational constant is a fundamental constant of nature that has a value of approximately 6.674 x 10^-11 Nm^2/kg^2.
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Can a vector with zero magnitude have one or more components that are zero? Explain.
Yes, a vector with zero magnitude can have one or more components that are zero. This is because a vector's magnitude is determined by the length of its components, which can be zero even if the magnitude of the vector is zero.
What is magnitude?Magnitude is a measure of the size, intensity, or strength of something. It is most commonly used to describe the size of an earthquake, magnitude being a measure of its energy release. It can also refer to the size of an astronomical object, such as a star or planet, or the strength of a magnetic field. Magnitude is expressed using a logarithmic scale, with each increase in magnitude representing a ten-fold increase in the strength or size of an object. For example, an earthquake of magnitude 5.0 is ten times as powerful as one of magnitude 4.0. Magnitude is an important concept in physics, astronomy, and other sciences.
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when a spring with a spring constant of 10 n/m has a 0.90 kg block attached to it and is then set into simple harmonic motion, how long does it take for the block to return to its starting position?
The time it takes for a 0.90 kg block to return to its initial position after being coupled to a spring with a spring constant of 10 n/m and put into simple harmonic motion is 1.88 seconds.
The time it takes for a block attached to a spring to complete one full oscillation (i.e., return to its starting position) in simple harmonic motion is given by:
[tex]T = 2\Pi\sqrt{(m/k)}[/tex]
here,
T is period of oscillation,
m is mass of the block, and
k is spring constant.
In this case, m = 0.90 kg and k = 10 N/m.
Reserving values :-
[tex]T = 2\pi\sqrt{(0.90 kg / 10 N/m)}[/tex]
[tex]T = 2\pi\sqrt{(0.09 m)}[/tex]
[tex]T = 2\pi * 0.3 m[/tex]
T = 1.88 s
Therefore, it will take approximately 1.88 seconds for the block to return to its starting position.
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a bit of the sunlit side of the moon shows with the light side being on the left called___
A bit of the sunlit side of the moon shows with the light side being on the left called as the darkside.
What is darkside?
The dark side of the moon is an idiom which refers to the unknown, mysterious and perhaps dangerous aspects of life. It describes the things that are hidden from us, the things that are hard to understand, and the things that can cause us harm. The phrase has been used to refer to the hidden depths of the human psyche, the unknown forces of the universe, and the unknown aspects of a person's life. It can also refer to a person's hidden and perhaps darker motivations and desires, as well as the unknown risks associated with decisions that people make. The phrase is a reminder that life is unpredictable and sometimes dangerous, and that people should be aware of the potential consequences of their decisions.
Therefore, A bit of the sunlit side of the moon shows with the light side being on the left called as the darkside.
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what is the accleration of free fall on a planet with four times the mass of the earth, but eight times the volume?
39.2 ms² is the acceleration of free fall on a planet with four times the mass of the earth, but eight times the volume.
Gravitational Acceleration: When a very big object, such as a planet, exerts a gravitational pull on a much smaller item, the planet's gravity causes the smaller object to fall downhill at a specific pace. Its pace is independent of the object's mass (provided that the object is significantly less massive than the planet).
The mass rises linearly while the radius shrinks exponentially, yielding
A = 4 × g
= 4 × 9.8 ms²
= 39.2 ms².
Gravity's acceleration is exclusively determined by the planet's mass and radius (distance from the center of the planet to its surface). The following equation may be used to calculate the acceleration due to gravity (g) given the planet's mass and radius (M and R).
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The Hoover dam produces about 4,200,000,000 kWh of energy each year, using flowing water to rotate fan like blades and turbine generators. Which of the following summarizes the production of energy at Hoover dam? 
The option that summarizes the production of energy at Hoover Dam is A. Mechanical Energy of the flowing water is transformed into electrical energy by rotating coils in a magnetic field, producing an alternating current.
How does the Hoover Dam produce electricity ?The Hoover Dam is a hydroelectric dam, which means it generates electricity by harnessing the mechanical energy of flowing water. The dam has a system of turbines that are turned by the flow of water, which then rotates coils of wire in a magnetic field.
This interaction produces an alternating current (AC) electrical signal, which is then transformed into usable electrical energy that can be distributed to power homes and businesses.
In this way, Hoover Dam and other hydroelectric dams generate electricity without producing any greenhouse gas emissions, making them an important source of clean and renewable energy.
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Options for this question are:
Mechanical Energy of the flowing water is transformed into electrical energy by rotating coils in a magnetic field, producing an alternating current.Mechanical energy of the flowing water is transformed into thermal energy by rotating coils in a magnetic field, producing a direct current.Thermal energy of the flowing water is transformed into electrical energy by rotating coils in a magnetic field, producing an alternating current.Thermal energy of the flowing water is transformed into mechanical energy by rotating coils in a magnetic field, producing a direct current.how are the electric field lines oriented (relative to the surface of the conductor) close to the conductor? how does this relate to the previous question?
The electric field lines that are near a conductor are parallel to that conductor's surface. The "normal" direction is thought to be this one.
This relates to the preceding query since sound waves can cause an object to vibrate and emit its own sound waves when they strike a solid object, such as a conductor. Depending on the relative phase and amplitude of the waves, the interference with the original sound waves can be either constructive or destructive. Because it may have an impact on how waves interact with the conductor and produce interference patterns, the orientation of the electric field lines close to the conductor is crucial. In general, the conductor has a stronger impact on the sound waves the closer it is to the source of the sound, and the interference patterns might become more complicated as a result.
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If we think about it carefully, isn’t the entire Universe nothing more than a bunch of matter interacting as it transfers energy around?
Answer:
Yes, that's a good way to think about it. The entire universe can be described as a vast collection of matter and energy that interact with one another in complex ways. Energy is transferred from one object to another through various processes, such as radiation, conduction, and convection. These interactions result in the movement and transformation of matter and energy, which in turn shape the physical and chemical characteristics of the universe as a whole. So, in a sense, the entire universe can be seen as a dynamic system of energy transfer.
Explanation:
Humans can visibly perceive light from about ____ to ____ nanometers.
a. 400, 400
b. 700, 400
c. 400, 700
d. 700, 700
therm is a unit that is generally used to measure the energy contained in natural gas.
There are 100,000 British Thermal Units in a Therm. Throughout in the country, the measurement, and billing unit for natural gas usage is the therm. Thus, it is true.
What is the use of therm unit in energy measure?Therm gauges how much heat energy is generated by natural gas. As a result, we are able to compute the real energy consumed.
The therm, or Non-SI unit of heat energy, is equivalent to 1,000,000 BTUs and is a non-international standard of measurement. Btu is another way to write British thermal units.
Your cumulative use of natural gas is measured in therms. The British Thermal Unit, or BTU, measures the amount of heat required to increase one pound of water's temperature by one degree Fahrenheit. One therm is equivalent to 100,000 BTUs.
Therefore, it is true that An energy unit is a thermon. It's a term used to characterize natural gas's energy. 100,000 Btu make up one therm. More energy exists in a BTU than a calorie.
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you are rescuing a person who has fallen down a well. the rope with which you are lifting the person will withstand a maximum tension of 850 n without breaking. the weight of the person being lifted is 700 n. the magnitude of the largest acceleration with which you raise the person is
Magnitude of the largest acceleration with which you raise the person is calculated as 1.214 m/s².
What is tension?The tension in the rope is directly related to the acceleration of person being lifted according to Newton's second law of motion:
Given, maximum tension the rope can withstand is 850 N, and weight of the person being lifted is 700 N.
As tension = mass x acceleration
Since the mass of the person is constant, we can write this equation:
Acceleration = Tension / mass
Acceleration = 850 N / 700 kg
= 1.214 m/s^2
Therefore, the magnitude of the largest acceleration with which you can raise the person is 1.214 m/s^2.
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Phases and Energy
Phase changes must either ______. or _______ energy.
Someone please help its a fill in the blank!
Phase shifts must either emit or absorb energy. When the system receives enough energy or loses enough energy, these changes take place.
What are the energy phase changes?While freezing, condensation, and deposition are exothermic processes, fusion, vaporization, and sublimation are endothermic processes. Phase changes, also known as phase transitions, include changes in state.
What two energy systems are involved in phase change?Form of latent heat when energy is transferred from solid to liquid during phase change. The transition from solid to liquid is endothermic, which means that the system absorbs energy. When the direction of the change goes from a liquid to a solid, the shift is exothermic (the system releases energy).
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find odd one out
stigma ,anther ,style ,ovary.
Answer:
style
Explanation:
how much solar wind kinetic energy per second would be intercepted by the sun-facing half of a 15 re sphere
A total of 1.3x10³⁶ particles are ejected from the Sun every second by the solar wind.
The solar wind is a jet of charged particles that the Sun's corona, or upper atmosphere, releases into space. Electrons, protons, and alpha particles with kinetic energies ranging from 0.5 to 10 keV make up the majority of this plasma. The solar wind plasma is made up of a variety of substances that are also present in the solar plasma, including traces of heavy ions and atomic nuclei like C, N, O, Ne, Mg, Si, S, and Fe. Other nuclei and isotopes including P, Ti, Cr, 54Fe and 56Fe, 58Ni, 60Ni, and 62Ni are also present in smaller amounts. The interplanetary magnetic field is superimposed with the solar-wind plasma.
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A wave has a frequency of 30 hz and speed of 60 m/s what is the wavelength of the wave
The definition of frequency, expressed in hertz, is the number of oscillations of a wave per unit of time (Hz). The relationship between frequency and pitch is straightforward. Frequencies between 20 and 20000 Hz are audible to humans.
What is the relation in frequency and wavelength in wave?The number of wave cycles or revolutions per second is known as frequency. The following is the frequency-based formula for period (T): If wavelength and velocity are taken into account for any wave, the Frequency Formula is expressed as. f = v λ
he relationship between these two factors is justified by the fact that the speed at which a wave travels is equal to the product of its frequency and wavelength.
V=fλ
f represent frequency
V= speed
λ = wavelength
by using this formula
λ = v/ f = 2nm
Therefore, 2nm is the wavelength of the wave.
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where grounded conductors of different systems are installed in the same raceway, cable, or enclosure, each neutral conductor shall be identified to distinguish the systems by .
The neutral conductors of different systems should be identified to distinguish the systems by using different colors, by using a tag, or by using other effective means.
What is conductors ?The neutral conductors of different systems should be identified to distinguish the systems by using different colors, by using a tag, or by using other effective means. This is to ensure the correct neutral conductor is connected to the correct system and to prevent any confusion when wiring. For example, if a neutral conductor from a 120V system and another from a 240V system are installed in the same raceway, cable or enclosure, they should be identified as such to prevent any wiring mistakes.
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(a)6an electron is to be accelerated from 3.00 * 106 m>s to 8.00 * 10 m>s. through what potential difference must the electron pass to accomplish this? (b) through what potential differ- ence must the electron pass if it is to be slowed from 8.00 * 106 m>s to a halt?
The work-energy theorem may be able to shed some light on the forces when an object's motion is known but the magnitudes of one or more of the forces acting on it are unknown. The work-energy theorem is applicable to forces that are both constant and variable.
What is the work energy theorem?The work-energy theorem states that the total work done by forces acting on an item is equal to the change in kinetic energy.
This theorem states that the net work performed on a body is equal to the change in the body's kinetic energy. The Work-Energy Theorem describes this. Kf - Ki = W is a representation of it.
(A)
from work energy theorem,
work done = change in kinetic energy
[tex]w = \frac{1}{2} mv^2 - \frac{1}{2} m u^2[/tex]
[tex]ev= \frac{1}{2} mv^2 - \frac{1}{2} m u^2[/tex]
[tex]V = \frac{1}{2e} [mv^2- mu^2][/tex]
[tex]V = \frac{1}{2(1.60\times 10^-19C)} [(9.11\times 10^-31kg) (8.00\times 10^6\frac{m}{s})^2- [(9.11\times 10^-31kg) (3.00\times 10^6\frac{m}{s})^2][/tex]
[tex]=157v[/tex]
The potential difference of electron is 157V.
(B)
[tex]w = \frac{1}{2} mv^2 - \frac{1}{2} m u^2[/tex]
[tex]ev= \frac{1}{2} mv^2 - \frac{1}{2} m u^2[/tex]
[tex]V = \frac{1}{2e} [mv^2- mu^2][/tex]
[tex]V = \frac{1}{2(1.60\times 10^-19C)} 0 - [(9.11\times 10^-31kg) (3.00\times 10^6\frac{m}{s})^2][/tex]
[tex]= 25.6V[/tex]
The potential difference of electron is 25.6V
Therefore, for (a) potential difference of electron is 157V and for (b) potential difference of electron is 25.6V
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A 4.7 kg cart is rolling down a ramp. Neglecting any friction and drag from impending motion, what is the magnitude of the normal force acting on the cart?
A. 45.1 N
B. 9.58 N
C. 46.1 N
D. 0.98 N
The magnitude of the normal force acting on the cart is 46.1 N.
option C
What is the force acting on the cart?The normal force is a contact force that acts perpendicular to the surface of contact between two objects. It arises due to the electrostatic repulsion between the atoms or molecules in the two surfaces in contact.
The magnitude of the normal force acting on the cart is calculated as;
Fn = mg
where;m is the massg is acceleration due to gravityFn = 4.7 kg x 9.8 m/s²
Fn = 46.1 N
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a bungee cord with a spring constant of 800 stretches 6 meters at its greatest displacement. how much elastic potential energy does the bungee cord have? the bungee cord has j of elastic potential energy.
Potential energy is a form of stored energy that is dependent on the relationship between different system components.
The bungee cord has 14400 joules of elastic potential energy.
The elastic potential energy of a spring (or in this case, a bungee cord) is given by the formula:
Elastic potential energy = [tex]1/2 * k * x^2[/tex]
Where:
k = spring constant
x = displacement from the equilibrium position
In this case, we know that the spring constant (k) is 800 and the maximum displacement (x) is 6 meters. Plugging these values into the formula, we get:
Elastic potential energy = [tex]1/2 * 800 * 6^2[/tex]
Elastic potential energy = [tex]1/2 * 800 * 36[/tex]
Elastic potential energy = 14400 joules
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If a gas and a liquid undergoes the same amount of heating, the gas will
expand ---------- times more than the liquid
If a gas and a liquid undergoes the same amount of heating, the gas will expand many times more than the liquid. This is because gases have lower densities and occupy more space than liquids, which allows them to expand more readily when heated. The amount of expansion will depend on the specific gas and liquid being considered, as well as the conditions under which they are being heated.
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Answer:
If a gas and a liquid undergo the same amount of heating, the gas will generally expand significantly more than the liquid. This is because gases have much lower density and higher thermal expansion coefficients than liquids, and therefore, they expand much more for a given temperature change.
The exact amount of expansion depends on the specific gas and liquid, the temperature change, and the pressure conditions, but it is typically several orders of magnitude greater for a gas than for a liquid. This difference in expansion behavior is one of the key characteristics of gases and liquids, and it has important implications for a variety of scientific and engineering applications.
Explanation:
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ALLEN
what units are used to measure mass in gravity calculations?
The S.I. unit to measure mass in all calculations including gravity related is kilograms.
What is kilogram?The kilogram is the SI unit of mass and it is the almost universally used standard mass unit.
Always remember that mass does not vary. If you measured the mass of an object here on Earth and on the Moon, you would find it was exactly the same. This is in line with common sense. If you take an object to the Moon, it is the same object, it looks exactly the same, and will have exactly the same reluctance to change its motion.
The simplest way to measure mass is not to compare the response of different objects to a force (so to gauge the mass in terms of their inertia or reluctance to accelerate). It is easier to compare two things with a beam balance than to measure their accelerations. If the masses are the same, the gravitational force on each will be the same and the beam will balance.
Concluding the concept of mass and the unit of conserved throughout the calculations which is kilogram here!
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Why is it difficult to make models of objects in the solar system?
Creating models of objects in the solar system is challenging due to the large distances, complex motions, interactions with other objects, and unknown properties of these objects.
The vast distances between the objects in the solar system can make it difficult to obtain accurate measurements of their positions and movements. The complex motions of the objects, including gravitational interactions with other objects, make it challenging to predict their positions and trajectories over long periods of time.
Additionally, some objects have properties that are not well understood, such as their composition and internal structure, making it difficult to model their movements accurately.
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which of the following is the best example of kinetic energy? ? a bird flying through the air ? a compressed spring ? a hammer set on a table ? a woodpecker about to hammer a tree
The best example of kinetic energy is a bird flying through the air. Kinetic energy is the energy an object possesses through motion.
What is kinetic energy?
Kinetic energy is the power a moving item uses to move. It is the energy of an object caused by its movement.It is the energy that an object has due to its movement. It is calculated by multiplying the object's mass by the square of its speed. The kinetic energy is directly proportional to the mass of the body and the square of its speed. Kinetic energy is a form of energy in motion, such as B. a moving car, a flying ball or a walking person. It is a form of energy associated with the movement of an object.
Kinetic energy is an important concept in physics because it is used to explain many phenomena and in many calculations.
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Electromagnetic radiation consists of particles called ______, each of which has a discrete amount, or quantum, of energy. However, since electromagnetic radiation also has wave properties, each particle is also characterized by a specific ________ (m) and frequency (s-1).
Electromagnetic radiation consists of particles called photons, each of which has a discrete amount, or quantum, of energy. However, since electromagnetic radiation also has wave properties, each particle is also characterized by a specific wavelength(m) and frequency (s-1).
What is wavelength?
A periodic wave's wavelength is the distance that its shape repeats. It is a feature of both travelling and standing waves, as well as other spatial wave patterns. It is the distance between two successive points on a wave that belong to the same phase, such as two nearby crests, troughs, or zero crossings. The spatial frequency is the reciprocal of wavelength. Lambda (λ), a Greek letter, is typically used to represent wavelength. The term wavelength is occasionally used to refer to all modulated waves, their sinusoidal envelopes, or waves created by the interference of several sinusoids.
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Is 0.8 electronegativity polar or nonpolar?
In the case of 0.8 electronegativity, a molecule or bond is polar based on this value.
Polarity depends on the difference in electronegativity between atoms in a bond or molecule. If the difference in electronegativity between atoms is small or zero, the bond or molecule is generally considered nonpolar, whereas if the difference in electronegativity is large, the bond or molecule is generally considered polar.
Electronegativity is a measure of an atom's ability to attract electrons towards itself when participating in a chemical bond. However, electronegativity values are not used to determine the polarity of a molecule or bond directly.
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A meteor when enters into the earth atmosphere burns what happens to its energy?
Answer: Heat by Friction
Explanation: When traveling they have a lot of kinetic energy however upon entering the earth's atmosphere the kinetic energy transforms into heat by friction causing it to burn and some of that energy is turned into light.
chester the turtle has a mass of 111kg. chester is accelerating at .34 m/s^2. . what force is acting on chester
Answer:
The correct option is C
1000
N
Given, acceleration,
a
=
2
m
s
−
2
and mass,
m
=
500
k
g
Let the net force be F.
According to Newton's second law of motion:
F
=
m
a
=
500
×
2
=
1000
N
∴
Net force applied is 1000 N.
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A skateboarder fell during a jump. She got up after 5 seconds, returns to a velocity of 5 m/s. What is her acceleration
Answer:
Acceleration= Velocity/time
Acceleration=5m/s\5s
Acceleration=1m/s2
if earth's mass decreased to one-half its original mass with no change in radius, then your weight would
Answer:
Because of symmetry the gravitational field of the earth acts as though all of the mass of the earth were centered at the center of the earth - so g = G M / R^2 and W = m g weight of an individual
If the mass (M) had 1/2 of its value the weight would also be halved.
a sphere made of rubber has a density of 1.08 g/cm3 and a radius of 8.00 cm. it falls through air of density 1.20 kg/m3 and has a drag coefficient of 0.500. what is its terminal speed (in m/s)?
The terminal speed of the falling rubber sphere is approximately 2.43 m/s.
Terminal speed is the constant velocity that a falling object eventually reaches when the resistance of the medium through which it is falling (such as air or water) prevents further acceleration.
[tex]v = \sqrt{\dfrac{2 \times m \times g}{\rho \times A \times C_d}}[/tex]
where ρ is the density of air, v is the velocity of the sphere, A is the cross-sectional area of the sphere, and [tex]C_d[/tex] is the drag coefficient.
The mass of the sphere can be calculated from its density and volume:
[tex]m = \dfrac{4}{3} \times \pi \times r^3 \times\rho[/tex]
where r is the radius of the sphere.
Mass = [tex]m = \dfrac{4}{3} \times \pi \times (0.08 m)^3 \times 1.08 \times \dfrac{1 kg}{1000 g}[/tex]
Mass = = 0.144 kg
Area is,
[tex]A = \pi \times r^2\\ = \pi \times (0.08)^2 \\= 0.0201 m^2[/tex]
The terminal velocity is,
[tex]v = \sqrt{\dfrac{2 \times 0.144 \times 9.81}{1.20\times 0.0201 \times 0.500}}[/tex]
= 2.43 m/s
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