A 1.0 kg ball is bounced high in the air. What is its total kinetic energy when it reaches its highest point?
a
30.0 joules
b
0 joules
c
50.0 joules
d
40.5 joules
e
100.0 joules
The correct answer is b) 0 joules.
At the highest point, the ball has zero velocity and therefore zero kinetic energy. Its potential energy is at a maximum, equal to the work done against gravity to get it to that height.