AP Physics Test 5

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

A boy kicks a football with a force of 20 N in 0.3 s.
Calculate the impulse on the ball.

• 1 N.s
• 6 N.s
• 66 N.s 
• None of these

A runner has a momentum of 670 kg m/s and is traveling at a velocity of 9 m/s. What is his mass?

• 74.4 kg
• 6030 kg
• 0.0134 kg
• 80 kg

What is an inelastic collision?

• When two objects collide, becoming stuck together and internal kinetic energy is lost (but not really lost, it transfers to different forms of energy)

• When two objects collide, becoming stuck together and internal kinetic energy is lost

• When two objects don't collide, becoming stuck together and internal kinetic energy is lost (but not really lost, it transfers to different forms of energy)

Collisions where objects BOUNCE apart.

• inelastic collisions

• elastic collisions

• explosions

• none of these

Collision where objects collide, and stick together.

• inelastic collision

• elastic collision

• explosion

• none of these

What is Impulse in terms of physics?

• the sudden urge to act on something

• the change in momentum

• the quantity of motion of a moving object, as determined by the objects mass and velocity

• a force acting over a period of time

If two objects collide or explode, they experience

• the same impulse causing the same change in momentum.

• different impulses causing the same change in momentum.

• different impulses causing different changes in momentum.

• the same impulse causing different changes in momentum.

Which of the 0.5kg spheres in the image experiences the greater force?

• Black

• White

• Same

• Not Enough Info