- #1
harujina
- 77
- 1
Homework Statement
Athletes who compete in downhill skiing try to lose as little energy as possible. A skier starts from rest at the top of a 65 m hill and skis to the bottom as fast as possible. When she arrives at the bottom, she has a speed of 23 m/s. Calculate the skier's efficiency. Explain why the mass of the skier is not required when calculating the efficiency.
Homework Equations
Eg = mgh
The Attempt at a Solution
I don't understand since Eg = mgh, and I'm only given height and velocity. How could I possibly find the skier's efficiency without mass?
*Also, another question asks how I could determine power without time. How is this possible when P = E/t?