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## Homework Statement

A construction worker at the top of a ladder drops her 250 g hard hat from a height of 22m. When it reaches the ground it is traveling at 9.0 m/s. What was the average fore of friction as it fell.

## Homework Equations

Stuck here....

## The Attempt at a Solution

Can't figure out what equations to use.... Tried finding t, then using ft=mv and solving for t, but that does work.