Which of the following is not a perfectly inelastic collision?

1.	Which of the following is not a perfectly inelastic collision?
A.	Striking of two glass balls
B.	A bullet striking a bag of sand
C.	An electron captured by a proton
D.	A man jumping into a moving cart
Answer» B. A bullet striking a bag of sand

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Which of the following is not a perfectly inelastic collision?

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