8 - Momentum

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

• size and shape
• mass and speed
• mass and veloctiy
• mass and energy

The equation to calculate momentum is

• p=mv
• p=1/2mv²
• p=mgh
• p=mg

Which has more momentum: a car stopped at a red light or a bike moving at 15 mph?

• car
• bike
• they are equal
• cannot determine using the info provided

A 2.5 kg ball moving at 5 m/s collides with a 2.5 kg stationary ball in a perfectly elastic collision so that the first ball stops from the collision.  What is the velocity of the second ball after the collision?

• 5 m/s
• 2.5 m/s
• 10 m/s
• 7.5 m/s

A 9300 kg railroad car traveling at a velocity of 5 m/s strikes a second boxcar that weighs 5000 kg at rest. The first car stops and the second car gains all the momentum. At what speed will the second boxcar move?

• 18.6 m/s
• 9.3 m/s
• 7.5 m/s
• 1.86 m/s

Momentum is a ____________________ quantity

• science
• scalar
• vector
• energy

A boy kicks a football with a force of 20 N, the time the force acts for is 0.3 s. Calculate the impulse on the ball.

• 1 N*s
• 6 N*s
• 33.3 N*s 
• None of these

The impulse is ______ the change in momentum

• Greater than
• Equal to
• less than
• always double

In any collision (crash) the ______ is ALWAYS constant

• total momentum

• accleration

• total velocity

• impulse

When two objects collide, the P_before is ____________ the P_after.

• more than 
• less than 
• equal to
• unrelated to