# physics

posted by
**Anonymous** on
.

A child and sled with a combined mass of 58.9 kg slide down a frictionless hill that is 8.09 m high at an angle of 23◦ from horizontal.

The acceleration of gravity is 9.81 m/s2 .

If the sled starts from rest, what is its speed at the bottom of the hill?

Answer in units of m/s