A 42.0 kg seal at an amusement part slides from restdown a ramp into the pool below. The top of the ramp is 1.75mhigher than the surface of the water and the ramp is inclined at anangle of 35 degrees to the horizontal. If the seal reaches thewater with a speed of 4.40 m/s, what is
(a) the work done by kinetic friction
(b) the co-efficient of kinetic friction betweenthe seal and the ramp.