- #1

King_Silver

- 83

- 6

## Homework Statement

A 72 kg skier leaves the end of a ski-jump ramp with a velocity of 24 m/s directed 25◦ above the horizontal. The skier returns to the ground at a point that is 14 m below the end of the ramp with a total speed of 22 m/s.

(a) What is the rate at which the gravitational force does work on the skier at the moment when he leaves

the ramp?

(b) With what total speed would he have landed if there were no air drag?

(c) What was the work done on the skier by the air drag?

## Homework Equations

This is what I am uncertain about.

## The Attempt at a Solution

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I think I was able to do part (c) by letting 1/2(m)(v2^2-v1^2) + mgh, Got a large number but it seems correct. What I am confused about is where to even start the first two questions, I have been looking through my notes but it seems I've misplaced my notes regarding this chapter which is fairly annoying. Could anyone recommend equations that would help resolve parts a and b?