The kinetic e nergy acquired by a body of mass 'M' in travelling a certain distance 'd: starting from rest,…

The kinetic e nergy acquired by a body of mass 'M' in travelling a certain distance 'd: starting from rest, under the action of constant force is
  1. inversely proportional to $\sqrt{\mathrm{M}}$.
  2. directly proportional to M.
  3. independent of M.
  4. directly proportional to $\sqrt{M}$.

Solution

Work done by external forces $=$ Change in kinetic energy Since particle starts from rest, its initial Kinetic Energy is o. Therefore, K.E.=Fd It is given that force is constant. We see that Kinetic energy is independent of mass.

Asked in: MHT CET 2020 (14 Oct Shift 2)

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