Question

which of following is not an example of perfectly inelastic collision

1- a bullet fired into block and and gets embedded in the block
2- capture of electron by an atom
3- a man jumping on to a moving boat
4- a ball striking another ball
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Answer 1

In case of perfectly inelastic collision, the two bodies move together with same velocity. A bullet striking the bag of sand, capturing of electron by a proton and a man jumping into the moving cart are the examples of perfectly inelastic collision whereas striking of two glass balls is an example of elastic collision.