A 280 kg seal at an amusement park slides down a ramp, Ask an Expert

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A 28.0 kg seal at an amusement park slides down a ramp intothe pool below. The top of the ramp is 1.70 m higher than thesurface of the water and the ramp is inclined at an angle of 30.0degrees above the horizontal. The seal reaches the water with aspeed of 4.90 m/s.

a) What is the work doen by kinetic friction?

b) What is the coefficient of kinetic friction between theseal and the ramp?

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