Momentum

In any collision

• total momentum is not conserved.
• total kinetic energy is conserved.
• total momentum is conserved.
• total momentum is not conserved but total kinetic energy is conserved.
• total momentum and total kinetic energy are conserved and the masses are equal.

The momentum of an object depends upon the object's ___________&_____________.  

• size and shape
• mass and speed
• mass and velocity
• mass and energy

The impulse is ______ the change in momentum

• greater than
• equal to
• less than
• always double

When the speed of an object is doubled, its momentum __________.

• remains unchanged 
• doubles
• quadruples
• decreases

Determine the momentum of 1000-kg car moving northward at 20 m/s.

• 20000 N
• 20000 Joules
• 20000 Kg * m/s
• 20000 kg * m/s north

If two objects have the same mass, then the faster moving object has ____________ momentum.

• more 
• less
• the same

Which object listed below has the greatest momentum?

• A 0.05 kg object rolling at 0.2 m/s.
• A 0.15 kg object rolling at 2 m/s.
• A 0.15 kg object rolling at 1 m/s
• A 0.4 kg object rolling at 2 m/s.

Two objects of equal mass hit a wall with the same velocity. They both rebound with the same velocity. Both objects experience the same momentum change but one experiences twice the force as the other. Which of the following statements is true?

• the contact time between the object and the wall of one is twice the contact time of the other
• the contact time between the object and the wall of one is equal to the contact time of the other
• the contact time between the object and the wall of one is one-half the contact time of the other
• the change in the kinetic energy is the same for the two objects
• the contact time between the object and the wall of one is 1/3 the contact time of the other

If the impulse of a boxer hitting another boxer stays the same but the time of contact doubles, how much would the new force be?

• 1/2 as much
• 1/4 as much
• 2x more
• 4x more

A club hit a golf ball with 1500 N of force and is contact with it for 0.5 seconds. Find the impulse on the ball.

• 750 N s
• 3000 N s
• 1500 N s
• 300 N s