JEE Main Physics question

A bullet hits and gets embedded in a solid block resting on a frictionless surface. In this process, which one of the following is correct? [DCE 2009]

(A)Only momentum is conservedCorrect
(B)Only kinetic energy is conserved
(C)Neither momentum nor kinetic energy is conserved
(D)Both momentum and kinetic energy are conserved

Answer: (A)

Solution

This is a perfectly inelastic collision; momentum is always conserved in a collision (no external horizontal force),

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Question ID VK-153580