1. The problem statement, all variables and given/known data 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. 2. Relevant equations Stuck here.... 3. 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.