Question

Give reasons why Kinetic energy of a body at rest is assumed to be equal to zero.

Answer 1

kinetic energy at rest is equal to zero when body posses both kinetic and potential energy it is equal to force by which body moves in the direction of the force

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Answer 2

The main reason for the zero kinetic energy when the body is at rest is because when a body is at rest then there can be potential energy whereas kinetic energy will move to zero.

The main reason for the establishment of kinetic energy is the movement of a body but since a body is at rest then there will be no kinetic energy.