I've been doing this problem for the last 170 minutes. Literally, and I'm pissed. A 43-kg seal at an amusement park slides from rest down a ramp into the pool below. The top of the ramp is 1.75 m higher than the surface of the water and the ramp is inclined at an angle of θ = 35.0° above the horizontal. If the seal reaches the water with a speed of 4.40 m/s, what is (a) the work done by kinetic friction and (b) the coefficient of kinetic friction between the seal and the ramp? http://www.askthefool.com/Pic7.jpg I've been doing W(non conservative) = 1/2 mv ^ 2 - mgh h = 1.75/sin(35) Don't know what's wrong.