More Collisions! Question Preview (ID: 44676)


Inelastic And Elastic Collisions. TEACHERS: click here for quick copy question ID numbers.

What does conservation of momentum mean?
a) When objects collide, the momentum is that of the largest object
b) When objects collide, the momentum is that of the smallest object
c) When objects collide, the total momentum stays the same
d) None of these answers is correct

Two bouncy balls collide. Identify this type of collision.
a) Elastic
b) Inelastic
c) Inelastic and Elastic
d) None of these answers are correct

A billiard ball (pool ball) collides elastically with an IDENTICAL billiard ball of the same mass that is at rest. After the collision, which of the following is true of the first ball?
a) It maintains its initial velocity
b) It has one-half its initial velocity.
c) It comes to rest.
d) It moves in the opposite direction.

If an object with a mass of 12 kilograms is moving at 10 m/sec what is its momentum?
a) 1.2 kg m/s
b) 1.2 kgms
c) 120 kgms
d) 120 kg m/s

If two bowling balls were to collide head on, and bounce off one another, the collision would be considered a(n) ______ collision.
a) Inelastic
b) Elastic
c) Angular
d) Explosive

Two ice skaters are initially at rest. The 78.2 kg male ice skater pushes his 48.5 kg female partner forward and away from his body, giving her a final velocity of 8.46 m/s. What is the male skater's final velocity as a result of the push?
a) +5.25 m/s
b) -5.25 m/s
c) -0.191 m/s
d) +0.191 m/s

A penalty shot requires hockey players to hit a stationary 0.2 kg puck at the goal. A hockey stick with a mass of 2 kg hits the puck with a velocity of 7.5 m/s. The final velocity for the hockey stick is 4 m/s. What is the final velocity of the puck?
a) +35 m/s
b) -35 m/s
c) +115 m/s
d) +4 m/s

A green ball of mass 0.35 kg travels at 2.6 m/s to the left and collides with a red ball of mass 0.35 kg that is initially at rest. After the collision, the green ball is at rest. What is the new velocity of the red ball?
a) +0.35 m/s
b) +2.6 m/s
c) -2.6 m/s
d) -0.35 m/s

A 90 kg man is standing still on frictionless ice. His friend tosses him a 10 kg ball, which has an initial velocity of 20 m/s. After catching the ball, what is their combined velocity?
a) 0 m/s
b) 2 m/s
c) 4.5 m/s
d) 20 m/s

Which of the following situations most closely resembles an inelastic collision?
a) a tennis racquet striking a tennis ball
b) a baseball being struck by a bat
c) a player kicking a soccer ball
d) a linebacker tackling a running back

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