Assertion A: Two equal masses moving toward each other with equal speeds collide and stick together; all their kinetic energy appears as heat. Reason R: The total momentum before the collision is zero

Question

Assertion A: Two equal masses moving toward each other with equal speeds collide and stick together; all their kinetic energy appears as heat. Reason R: The total momentum before the collision is zero, so the combined body is at rest afterwards.

TestHub · Accepted Answer

Momentum conservation gives zero final momentum, so the stuck-together body is at rest and its final KE is zero. The whole initial KE is therefore converted to heat. Both true and R explains A.

Physics - Heat & Thermo Question with Solution | TestHub

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