Momentum and Conservation of Momentum

When comparing the momentum of two moving objects, which of the following is correct?

• The object with the higher velocity will have less momentum if the masses are equal.

• The more massive object will have less momentum if its velocity is greater.

• The less massive object will have less momentum if the velocities are the same.

• The more massive object will have less momentum if the velocities are the same.

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NGSS.HS-PS2-2

Which of the following has the greatest momentum?

• a tortoise with a mass of 275 kg moving at a velocity of 0.55 m/s

• a hare with a mass of 2.7 kg moving at a velocity of 7.5 m/s

• a turtle with a mass of 91 kg moving at a velocity of 1.4 m/s

• a roadrunner with a mass of 1.8 kg moving at a velocity of 6.7 m/s

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NGSS.HS-PS2-2

After colliding, objects are deformed and lose some kinetic energy. Identify the type of collision.

• elastic

• inelastic

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NGSS.HS-PS3-1

NGSS.HS-PS3-2

One object collides with another object initially at rest. If the collision is inelastic, what happens to the momentum of the object that was at rest?

• The momentum increases

• The momentum decreases

• The momentum remains unchanged

• If the object is not moving before the collision, it never has momentum

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NGSS.HS-PS2-2

What is true of the total momentum before and after a collision if the collision is inelastic?

• It increases after the collision

• It decreases after the collision

• It remains constant before and after the collision

• It is squared

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NGSS.HS-PS2-2

In which type of collision is total kinetic energy conserved?

• Only in elastic collisions

• Only in inelastic collisions

• Kinetic energy is always conserved

• Kinetic energy is never conserved

Cart A is pulled with a 2 Newton force for 2 seconds, and Cart B is pulled with a 1 Newton force for 3 seconds. Which cart experiences the greatest impulse?

• Cart B

• Cart A

• Both are same

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NGSS.HS-PS2-2

The impulse-momentum theorem states that

• the impulse on an object is equal to the change in momentum it causes

• the force on a moving object is equal to the magnitude of the impulse.

• the impulse on an object is greater than the change in momentum it causes

• the impulse on an object is less than the change in momentum it causes

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NGSS.HS-PS2-2

What is an inelastic collision?

• when objects stick together after impact, and their internal energy is not conserved

• when objects stick together after impact, and their internal energy is conserved

• when objects stick together after impact, and always come to rest instantaneously after collision

• when objects stick together after impact, and their internal energy increases

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NGSS.HS-PS2-2

A billiard ball collides with a stationary identical billiard ball in an elastic head-on collision. After the collision, which fo the following is true of the first ball?

• it maintains its initial velocity

• it has one-half its initial velocity

• it comes to rest

• it moves in the opposite direction

Tags

NGSS.HS-PS2-2