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A bolt of mass 0.3 kg falls from the ceiling of an elevator moving down with a uniform speed of 7m/s.It hits the floor of the elevator (length of the elevator =3m) and does not rebound.What is the heat produced by the impact ?Would the answer be different if the elevator were stationary?

A bolt of mass 0.3 kg falls from the ceiling of an elevator moving down with a uniform speed of 7m/s.It hits the floor of the elevator (length of the elevator =3m) and does not rebound.What is the heat produced by the impact ?Would the answer be different if the elevator were stationary?

Grade:12

1 Answers

AskiitianExpert Shine
10 Points
12 years ago

hi

the potential energy of  the bolt considering the lift floor as datum is converted into heat energy. therefore answer = mgh.

nw even if the elevator is stationary , then also answer wud be the same as the change in energy is still the same . although initial and final kinetic energies are diff, but the change in kinetic energies are the same.

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