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A bullet is fired and gets embedded in a block kept on the table. If a table is frictionless, then ___________

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A bullet is fired and gets embedded in a block kept on the table. If a table is frictionless, then ___________

(a) Kinetic energy gets conserved

(b) Potential energy gets conserved

(c) Momentum gets conserved

(d) Kinetic energy and potential energy gets conserved

I had been asked this question in semester exam.

This interesting question is from Moment of Inertia in portion System of Particles and Rotational Motion of Engineering Physics I

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Correct answer is (c) Momentum gets conserved

Easiest explanation: Only momentum gets conserved when a bullet is fired and gets embedded in a block kept on a frictionless table. Some kinetic energy is lost when the bullet penetrates the block.

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