Momentum and Impulse

Which of these is the correct definition for momentum and its unit?

• A

• B

• C

• D

Which of the following terms and equations are equivalent to the change an object's momentum?

• A

• B

• C

• D

A ball with mass of 5.0 kg is moving with a velocity of 3.0 m/s. What is the momentum of the ball?

• 0.6 kg m/s

• 1.70 kg m/s

• 15 kg m/s

• 15 000 kg m/s

A rollercoaster speeds along a track with considerable momentum.

If a different rollercoaster travels at four times the speed but has half as much mass, its momentum is would be:

• zero

• twice as much

• four times as much

• unchanged

Padded dashboard in cars are safer in an accident than non-padded ones because a passenger hitting the dashboard would experience.

• Lengthened time contact

• shorter time of contact

• decreased impulse

• increase momentum

A passenger of mass 90 kg is involved in a minor car crash.

The car approaches a solid barrier at 32 m/s. It crashes into the barrier and stops in 0.2 s.

Determine the impulse that must be applied to the car to bring it to rest.

• 2.8 Ns

• 14 Ns

• 580 Ns

• 2900 Ns

An object of mass 150 kg accelerates from a velocity of 5 m/s to a velocity of 10 m/s in the same direction.

What is the impulse provided to cause this acceleration?

• 750 Ns

• 1500 Ns

• 2250 Ns

• 7500 Ns

During a paintball fight, a paint pellet of mass 150 g hits a stationary target with a speed of 220 m/s. It takes 0.0245 s from the moment the pellet comes into contact with the wall until it flattens onto the wall.

What is the force exerted as a result of the paintball 'splat'?

• 1.3 x 10^3 N

• 33 N

• 1.3 x 10^6 N

• 33 x 10^3 N

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

• size and shape

• mass and speed

• mass and velocity

• mass and energy

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