Recent content by bane32

I know that his starting PE=3175.2 J based on his starting height of 5.4 meters above the ground. I know that as he falls, his PE gets converted to KE. It seems like when he first hits the mat at 1.08 m, his KE=3175.2 - (60)(9.8)(1.08)=2540.16 J. What's throwing me off is what to do afterwards...

Need to find normal force from the mat.