Question

What would be the change in the kinetic energy of a body if it's speed is halved ? .

Answer 1

Answer:

If the speed of the body is halved , then its kinetic energy is reduced 1/4 of its original value since the kinetic energy of a body is directly proportional to the square of its velocity.

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Answer 2

Answer:

Kinetic energy is directly proportional to the square of a speed of a body.

So if speed is halved, kinetic energy becames 1/4th of the original.