A) Capture of an electron by proton
B) Man jumping on to a moving cart
C) Collision between glass balls
D) A bullet fired into a block of wood such that it is embedded in the wood
Correct Answer: C
Solution :
For perfectly inelastic collision, the two bodies must stick together after the collision\[i.e.\], they should from a combined system. Let us discuss each option one by one: [a] When a proton captures an electron, as clear form the language of the option itself, the electron becomes a part of proton. Thus both constitute a combined system. [b] When a man jumps on a moving a cart, he becomes a part of the cart, both move with some common velocity. [c] In collision between rigid balls, it is never possible that both will form a combined system and will move with common velocity. So this case cannot be an example of perfectly inelastic collision. [d] When a bullet fired into a block gets embedded in the wood, both form combined system.
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