A cart approaches a hill at an unknown velocity. It comes to rest at the top of

A cart approaches a hill at an unknown velocity. It comes to rest at the top of the hill. Assume friction is negligible. 5.00 kg
10.0 m
Which is the best estimate for the amount of kinetic energy that the cart had at the bottom of the hill?
А
4.91 Joules
B
50.0 Joules
С
250 Joules
D
490 Joules