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## Homework Statement

A skier traveling 12.6 m/s reaches the foot of a steady upward 20° incline and glides 11.4 m up along this slope before coming to rest. What was the average coefficient of friction?

## Homework Equations

Egi+Eki+wnc=Egf+Ekf

## The Attempt at a Solution

I solved for everything but i don't know how to solve for mew