Question

Gayle runs at a speed of 4.65 m/s anddives on a sled, initially atrest on the top of a frictionlesssnow covered hill. After she hasdescended a vertical distance of5.00 m, her brother, who isinitially at rest, hops on her back andtogether they continue downthe hill. What is their speed at thebottom of the hill if the totalvertical drop is 20.5 m? Gayle's mass is 50.0 kg, the sled hasamass of 5.00 kg and her brother has a mass of 30.0 kg.