Momentum Test review

A ball moving at 5 m/s strikes another ball of equal mass. The first ball stops moving after the collision. What is the velocity of the second ball after the collision?

• -5 m/s

• 0 m/s

• 5 m/s

• 10 m/s

A pool ball hits the edge of another pool ball that is initially at rest. The second ball moves off at an angle. Which of the following is true?

• The momentum lost by the first ball is gained by the second ball.

• The total momentum of the system increases.

• The momentum of the second ball doesn't change.

• The momentum of the first ball doesn't change.

Conservation of momentum follows from:

• Newton's first law

• Newton's second law

• Newton's third law

• The law of conservation of energy

Which of the following expresses the law of conservation of momentum?

• The total momentum of an isolated system is zero

• The total momentum of any system always remains constant.

• Every object in an isolated system maintains a constant momentum.

• The total momentum of an isolated system remains constant regardless of the forces between the objects in the system.

When two objects interact in an isolated system,

• the momentum of each object is conserved.

• the total momentum of the system is zero.

• the total momentum is conserved only if the objects move in opposite directions.

• the total momentum is always conserved.

When 2 ice skaters initially at rest push off one another, their final momenta are

• equal in magnitude and direction

• equal in magnitude and opposite direction

• in the same direction but of different magnitudes

• in opposite directions and possibly of different magnitudes

A small marble collides with a billiard ball that is initially at rest. Which of the following is true?

• The total momentum before and after the collision is zero.

• The momentum of the billiard ball increases and the momentum of the marble decreases.

• The momentum of each object decreases.

• The momentum of each object increases.

Pick the picture that best describes the changes in momentum of 2 balls of equal mass but different speeds collide head on.

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If a boy jumps on a skateboard with a velocity of 5 m/s, predict the velocity of the 2 together, now the the boy and skateboard are moving together.

• stay a 5 m/s

• greater than 5 m/s

• less than 5 m/s

What is the momentum of a 10 kg object traveling at 5 m/s

p=mv

• 50 kg.m/s

• 15 kg.m/s

• 5 kg.m/s

• 2 kg.m/s