Physics Quiz - Practice for Test 8 - Momentum, Conservation

Which of the following is a complete, correct answer for calculating Momentum?

• 13.7 kg-m/s, East

• 13.7 kg-m/s², West

• 13.7 m/s, North

• 13.7 kg, South

Which of the following best describes Momentum?

• mass in motion

• changing velocity

• at rest

• free fall

Determine the momentum of a 60-kg halfback moving eastward at 9 m/s.

• 540 kg-m/s, East

• 540 kg-m/s

• 6.67 kg-m/s, East

• 6.67 kg-m/s

A car possesses a momentum of 20 000 kg-m/s, North. How would its momentum be affected if its velocity was doubled?

• Doubling the velocity will double the momentum.

• Doubling the velocity will cut the momentum in half.

• Doubling the velocity will triple the momentum.

• Doubling the velocity will quadruple the momentum.

To stop an object with a certain amount of momentum, which of the following would have to de done?

• You would have to apply a force against its motion for a given period of time.

• You would have to apply a force in the same direction as its motion for a given period of time.

• You would have to remove all of the mass of the object.

• You would have to apply Newton's First Law.

Which of the following is the best definition of the term "impulse"?

• change in momentum

• change in velocity

• change in acceleration

• change in mass

According to the Vector Diagram, which case has the greatest velocity change?

• The velocity change is greatest in case B.

• The velocity change is greatest in case A.

• The velocity change is the same in both cases.

Collisions in which objects rebound with the same speed (and thus, the same momentum and kinetic energy) as they had prior to the collision are known as:

• elastic collisions.

• inelastic collisions.

• collapsing collisions.

• spandex collisions.

In general, elastic collisions are characterized by which of the following? CHOOSE ALL THAT APPLY!

• a large velocity change

• a large momentum change

• a large impulse

• a large force

A 0.50-kg cart (#1) is pulled with a 1.0-N force for 1 second; another 0.50 kg cart (#2) is pulled with a 2.0 N-force for 0.50 seconds. Which cart has the greatest change in momentum?

• Cart #1 has the greatest change in momentum.

• Cart #2 has the greatest change in momentum.

• The momentum change is the same for both carts.

• There is not enough information to answer this question.