1. The problem statement, all variables and given/known data A high diver of mass 50.0 kg jumps off a board 10.0 m above the water. If her downward motion is stopped 2.30 s after she enters the water, what average force did the water exert on her? 2. Relevant equations Fnet=ma vf2=v02+2ax 3. The attempt at a solution First I found the final velocity of the diver when she hits the water vf2=02+2(9.8)(10)=196 vf=14 m/s Since she is slowed to a stop in 2.3s the average acceleration would be 14/2.3 = 6.08696 Knowing acceleration and her mass, we can calculate the force. F=50(6.08696)=304.348 This answer was marked wrong. I'm pretty sure I did everything right. Am I missing something?