Q32 of 48 Page 45

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?

For particle a,


Change in kinetic energy = work done by the force



For particle b,


Change in kinetic energy = work done by the force



Now,



∵ and the magnitude of the force is same


∴ displacement will also be the same


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