Question
Two bodies of unequal mass are moving in the same direction with equal kinetic energy. The two bodies are brought to rest by applying retarding force of same magnitude. How would the distance moved by them before coming to rest compare?

Answer

By work energy theorem change in KE is equal to work is equal done by body. Hence KE = WD Hence, both bodies will travel equal displacement or distance (it does not depend on mass of bodies.)

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