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If you double the radius of a spinning object and reduce its angular velocity by a...
If you double the radius, for a fixed angular velocity, the tangential velocity will: a. Decrease...
If you double the radius, for a fixed angular velocity, the tangential velocity will: a. Decrease by half b. Stay the same c. Increase by a factor of two d. Increase by a factor of four
A disk with radius 0.6 meters and mass 31 kg is spinning about its own center with an angular velocity of 88ed A solid sphere (/ mR2) with a radius of 0.18 meters which is spinning with an angula...
A disk with radius 0.6 meters and mass 31 kg is spinning about its own center with an angular velocity of 88ed A solid sphere (/ mR2) with a radius of 0.18 meters which is spinning with an angular velocity of -18 ed (the negative sign indicates the opposite 6. rad sec direction), is gently lowered onto the disk a sticks to the disk. The two rotate together (about their mutual center of mass) at an angular velocity of 33...
1). A metal disk with radius, r, is spinning with a constant angular velocity. A red...
1). A metal disk with radius, r, is spinning with a constant
angular velocity. A red magnet is placed on the disk
at
and a blue magnet is placed at r. If you compare the
tangential speed of the two magnets,
a. the red magnet is going half as fast
b. the magnets are going the same speed
c. the blue magnet is going twice as fast
d. the blue magnet is going four times as fast
2). In the...
If the mass of the Earth increased without any change in its radius your weight would...
If the mass of the Earth increased without any change in its radius your weight would increase decrease stay the same The value of acceleration due to gravity. O depends on the radius of Earth O depends on the mass of the Earth B. O depends on the universal gravitational constant, G o is different on different planets all of the above Which is true: the gravitational potential energy of an object in Earth's orbit depends on the radius of...
If the velocity of an object is doubled and its mass is halved, which of the...
If the velocity of an object is doubled and its mass is halved, which of the following statements is true about the object? Select one: a. Its momentum is halved; its kinetic energy doubles. b. Its momentum stays the same; its kinetic energy doubles. c. Its momentum is halved; its kinetic energy quadruples. d. Its momentum is halved; its kinetic energy is also halved.
QUESTION 5 A figure skater is spinning with an angular velocity of Il rad/s. She then...
QUESTION 5 A figure skater is spinning with an angular velocity of Il rad/s. She then comes to a stop over a brief period of time. During this time, her angular displacement is 5.9 rad. Determine her average angular acceleration, in SI units, with 3 or more significant figures QUESTION 6 Suppose you exert a force of 171 N tangential to a 0.26 m radius 83 kg grindstone (a solid disk). What is the angular acceleration if there is an...
A particle object undergoes uniform circular motion at a speed v around a circle of radius...
A particle object undergoes uniform circular motion at a speed v around a circle of radius r. Given v and r, the magnitude of centripetal acceleration is a0. Assume when either v or r are changed, the particle remains in uniform circular motion. 1. Suppose the radius of the circle is cut in half. What happens to the magnitude of the centripetal acceleration? choices: the acceleration doubles, acceleration increases by square root of 2, acceleration remains the same, acceleration decreases...
When the angular frequency of the rotor in the experiment is increased the spring force increases...
When the angular frequency of the rotor in the experiment is increased the spring force increases there is no change in the orbital speed the radius of the orbit decreases the centripetal force increases by the same proportion a) the spring force increases b) there is no change in the orbital speed c) the radius of the orbit decreases d) the centripetal force increases by the same proportion If an object in circular motion at radius r and speed v...
10*) The Sun has approximate radius 7×108 m, and rotates around its axis once every 27...
10*) The Sun has approximate radius 7×108 m, and rotates around
its axis once every 27 days. a) Find its angular velocity in rad/s,
and (assuming it is a uniform sphere) write a formula for its
angular momentum expressing it in terms of its mass M (you do not
need to substitute a value for M). b) Suppose the Sun were to
collapse to a neutron star, which is a much denser state, without
losing any mass and without being...
1 niter tof each question. 1. If you push twice as hard against a stationary brick...
1
niter tof each question. 1. If you push twice as hard against a stationary brick wall, the amount of work you do on the wall A) quadruples. B) doubles. C) is cut in half. D) remains constant but non-zero. E) remains constant at zero. 2. The work done by the centripetal force on an object with a mass of 1 kg moving with a constant velocity of 4 m/s into a circular path of radius 0.6 m for one...
A disk with radius 0.6 meters and mass 31 kg is spinning about its own center with an angular velocity of 88ed A solid sphere (/ mR2) with a radius of 0.18 meters which is spinning with an angular velocity of -18 ed (the negative sign indicates the opposite 6. rad sec direction), is gently lowered onto the disk a sticks to the disk. The two rotate together (about their mutual center of mass) at an angular velocity of 33...
1). A metal disk with radius, r, is spinning with a constant
angular velocity. A red magnet is placed on the disk
at
and a blue magnet is placed at r. If you compare the
tangential speed of the two magnets,
a. the red magnet is going half as fast
b. the magnets are going the same speed
c. the blue magnet is going twice as fast
d. the blue magnet is going four times as fast
2). In the...
If the mass of the Earth increased without any change in its radius your weight would increase decrease stay the same The value of acceleration due to gravity. O depends on the radius of Earth O depends on the mass of the Earth B. O depends on the universal gravitational constant, G o is different on different planets all of the above Which is true: the gravitational potential energy of an object in Earth's orbit depends on the radius of...
QUESTION 5 A figure skater is spinning with an angular velocity of Il rad/s. She then comes to a stop over a brief period of time. During this time, her angular displacement is 5.9 rad. Determine her average angular acceleration, in SI units, with 3 or more significant figures QUESTION 6 Suppose you exert a force of 171 N tangential to a 0.26 m radius 83 kg grindstone (a solid disk). What is the angular acceleration if there is an...
10*) The Sun has approximate radius 7×108 m, and rotates around
its axis once every 27 days. a) Find its angular velocity in rad/s,
and (assuming it is a uniform sphere) write a formula for its
angular momentum expressing it in terms of its mass M (you do not
need to substitute a value for M). b) Suppose the Sun were to
collapse to a neutron star, which is a much denser state, without
losing any mass and without being...
1
niter tof each question. 1. If you push twice as hard against a stationary brick wall, the amount of work you do on the wall A) quadruples. B) doubles. C) is cut in half. D) remains constant but non-zero. E) remains constant at zero. 2. The work done by the centripetal force on an object with a mass of 1 kg moving with a constant velocity of 4 m/s into a circular path of radius 0.6 m for one...
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