Question

Doubling speed does what to kinetic energy?
It stays the same
The final kinetic energy is double the initial kinetic energy
The final kinetic energy is 4 times the initial kinetic energy
The final kinetic energy is half the initial kinetic energy

Answer 1

Answer:

Final K.E. is four times initial KE

Explanation:

K. E. = 1/2 mv ^2        now double the speed

new K.E. = 1/2 m (2v)^2

               = 1/2 m 4 v^2

                = 4 * 1/2 m v^2