Question

what happens to the kinetic energy of an object if its speed is doubled?
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Answer 1

Answer:

The change in the kinetic energy of the object as the speed changes is proportional to the square of the factor by which the speed changes. If the speed of the object becomes double, its kinetic energy changes to four times the initial kinetic energy.

Answer 2

Explanation:

k.e. = 1/2 mv^2

new k.e. = 1/2 m(2v)^2 = 4× (1/2 mv^2) = 4 k.e.