1. Mr Grewal (m = 65 kg) is skiing up a hill inclined at 21. When he is 10.0 m high and he is traveling at 18.0 m/s [up the hill], Mr Jack gives him a mighty push over a distance of 2.00 m [uphill] directed parallel to the hill. Mr Grewal continues up the hill to a new height of 25.0 m at which point he is moving at 6.00 m/s [up the hill]. If the coefficient of kinetic friction between the skis and snow is 0.18, find the force that Mr Jack pushed with. (Use Conservation of Energy Methods for full marks!) (6 marks)