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More Collisions!
Test Description: Inelastic and Elastic Collisions
Instructions: Answer all questions to get your test result.
1) What does conservation of momentum mean?
A
When objects collide, the total momentum stays the same
B
When objects collide, the momentum is that of the smallest object
C
None of these answers is correct
D
When objects collide, the momentum is that of the largest object
2) Two bouncy balls collide. Identify this type of collision.
A
None of these answers are correct
B
Elastic
C
Inelastic
D
Inelastic and Elastic
3) 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 has one-half its initial velocity.
B
It moves in the opposite direction.
C
It comes to rest.
D
It maintains its initial velocity
4) 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
120 kg m/s
C
120 kgms
D
1.2 kgms
5) If two bowling balls were to collide head on, and bounce off one another, the collision would be considered a(n) ______ collision.
A
Angular
B
Inelastic
C
Elastic
D
Explosive
6) 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
+0.191 m/s
B
+5.25 m/s
C
-5.25 m/s
D
-0.191 m/s
7) 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
+115 m/s
B
-35 m/s
C
+4 m/s
D
+35 m/s
8) 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
+0.35 m/s
C
-2.6 m/s
D
+2.6 m/s
9) 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
4.5 m/s
C
20 m/s
D
2 m/s
10) Which of the following situations most closely resembles an inelastic collision?
A
a linebacker tackling a running back
B
a baseball being struck by a bat
C
a tennis racquet striking a tennis ball
D
a player kicking a soccer ball
*select an answer for all questions
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