4
lesson pretestMultiple Choice

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Question 4 • Physics I

Which are examples of perfectly inelastic collisions? Choose three correct answers.

Answer
A
two train cars coupling together
B
rain sticking to a window
C
a cue ball hitting an eight ball and stopping
D
a baseball bouncing off a bat
E
bumper cars bumping off of each other
F
a plane landing on an aircraft carrier

Explanation

In a perfectly inelastic collision, the objects stick together after impact and move as one. A plane that lands on an aircraft carrier, train cars that couple together, and rain that sticks to a window fit this description. The other examples involve objects bouncing apart or continuing separately, so they are not perfectly inelastic.

AI-written and checked against the verified answer.

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