At Sea World, a 28.0-kg seal slidesdown a ramp into the pool below. The top of the ramp is1.75 m higher than the surface of thewater, and the ramp is inclined at an angle of 30.0° above thehorizontal. The seal reaches the water with a speed of 4.90m/s.
(a) What is the work is done by kinetic friction?
(b) What is the coefficient of kinetic friction between the sealand the ramp?