Question

derive the expression for kenetic energy when the body is moving from rest

Answer 1

Answer:

Suppose a body of mass m is moving with velocity v. It is brought to rest by applying a retarding force F. Suppose it traverses a distance s before coming to rest. Kinetic energy of body, KE = Work done by retarding force to stop it.

Step-by-step explanation:

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Answer 2

Answer:

Ek = ½mv2 Ek = Et + Er

Step-by-step explanation:

In physics, the kinetic energy (KE) of an object is the energy that it possesses due to its motion. It is defined as the work needed to accelerate a body of a given mass from rest to its stated velocity.

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