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提问人：网友ljhdx9082007 发布时间：2022-01-07

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5.Object 1 has twice the mass of Object 2. Both objects have the same kinetic energy. Which of the following statements is true？

A、Both objects can have the same magnitude of momentum.

B、Object 1 has a momentum of greater magnitude than Object 2.

C、The magnitude of the momentum of Object 2 is four times that of Object 1.

D、All the statements are false.

E、All the statements are true.

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更多“5.Object 1 has twice the mass of Object 2. Both objects have the same kinetic energy. Which of the f…”相关的问题

第1题

Three satellites are launched into space connected together. Once in deep space, an explosive charge separates the three satellites and they move apart. The satellites each have different masses with m1 < m2< m3. Which of the following statements is always true?

A、The one with mass m1 receives the greatest impulse.

B、The one with mass m3 receives the greatest impulse.

C、The all must receive equal impulses.

D、Although one or more of the above statements could be true in special cases, they are not always true.

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第2题

A neutron in a nuclear reactor makes an elastic head-on collision with a carbon atom initially at rest. (The mass of the carbon atom is 12 times that of the neutron.) What fraction of the neutron's kinetic energy is transferred to the carbon atom?

A、14.4%

B、28.4%

C、41.4%

D、56.6%

E、90.2%

F、5.8%

G、60.3%

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第3题

A 20-g bullet moving at 1 000 m/s is fired through a one-kg block of wood emerging at a speed of 100 m/s. If the block had been originally at rest and is free to move, what is its resulting speed?

A、9 m/s

B、18 m/s

C、90 m/s

D、900 m/s

E、60 m/s

F、600 m/s

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第4题

Two masses collide and stick together. Before the collision one of the masses was at rest. Is there a situation in which the kinetic energy is conserved in such a collision?

A、Yes, if the less massive particle is the one initially at rest.

B、Yes, if the more massive particle is the one initially at rest.

C、Yes, if the two particles have the same mass.

D、No, kinetic energy is always lost is such a collision.

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第5题

2 600 rev/min is equivalent to which of the following?

A、2600 rad/s

B、43.3 rad/s

C、272 rad/s

D、60 rad/s

E、605 rad/s

F、720 rad/s

G、160 rad/s

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第6题

What is the angular speed about the rotational axis of the Earth for a person standing on the surface?______×10^-5 rad/s

A、7.3

B、3.6

C、6.28

D、3.14

E、23.14

F、6.1

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第7题

For a point on a spinning disc in uniform circular motion, which of the following is not constant?

A、It's angular speed

B、It's angular acceleration

C、It's centripetal acceleration

D、The magnitude of it's total acceleration

E、None of the others

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第8题

A car is going around a racetrack at constant speed. The curves around the track have different radii. In which turn is the magnitude of the car's acceleration the greatest?

A、It is the greatest in the turn with the greatest radius.

B、It is the greatest in the turn with the smallest radius.

C、The acceleration is zero everywhere because of the constant speed.

D、More information is needed to determine the answer.

E、None of the others

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第9题

Two points on a merry-go-round are located at distances from the center r1 and r2, where r1 < r2. While the merry-go-round is in the process of speeding up to operational speed, which of the following equations involving magnitudes of angular speed, angular acceleration, and tangential speed for these points is incorrect?

A、ω1 = ω2

B、α1 = α2

C、Vt1 = Vt2

D、All of the equations are correct.

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第10题

Suppose a wheel is initially rotating at 10.0 rad/s while undergoing constant angular acceleration reaching a speed of 30.0 rad/s after 20.0 seconds have elapsed. How long after the initial time has the wheel undergone half of the angular displacement that it will have gone through during the entire 20.0 second interval?

A、10.0 s

B、12.4 s

C、14.2 s

D、15.0 s

E、18.0 s

F、19.3 s

G、5.1 s

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