A 500-Kg Skier Starting from Rest Travels 200 M Down a a Hill

Short Answer

A 50.0-kg skier starting from rest travels 200 m down a hill that has a 20.0° slope and a uniform surface.When the skier reaches the bottom of the hill,her speed is .
(a)How much work is done by friction as the skier comes down the hill?
(b)What is the magnitude of the friction force if the skier travels directly down the hill?