A 60.0 kg skier rides a 2860 m long lift to the top of a mountain. The lift makes an angle of 14.1° with the horizontal. What is the change in the skier's gravitational potential energy?
What is mgh? Answer: 60*9.8*2860sin14.1
Question you need to answer: Work is defined as force.distance, where the dot means cosine of the angle between force and distance. Exactly how does that apply here? Hint: draw the diagram.