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**Checking to see if I'm right....or not.**

## Homework Statement

A hill is 100 m long and makes an angle of 12 degrees with the horizontal. As a 50-kg jogger runs up the hill, how much work does gravity do on the jogger?

## Homework Equations

Do I use PEg=mgDelta Y ?

## The Attempt at a Solution

PEg = (50 kg) (9.8 m/s2) (100m) which equals 49,000 which is wrong. I know the answer is -10,000 J.

How and why? So confused....