The speed doesn't change. What does that tell you?
If you don't know, review the definition of kinetic energy:
(1/2) M V^2
Even if the velocity changes sign, V^2 does not change sign.
The mass M doesn't change, either.
A ball of mass 0.70 kg moving with speed of 1.0 m/s hits a wall and bounces back with the same speed in the opposite direction. What is the change in the ball's kinetic energy?
1 answer
1 answer