A child and sled with a combined mass of 47.8 kg slide down a frictionless hill that is 7.18 m high. If the sled starts from rest, what is its speed at the bottom of the hill?

Answer 1

V^2 = Vo^2 + 2g*h.
V^2 = 0 + 19.6*7.18 = 140.738
V = 11.86 m/s.