Question

1a) You are in a roller coaster that is moving at 24.5 m/s on a horizontal section of track near the loading deck. A braking system abruptly brings the 310 kg car (rider mass included) to a speed of 1.3 m/s over a distance of 4 meters.

i) Calculate the power disapated by the brakes.    

1b) The ski slopes at Marble Mountain make use of tow ropes to pull snowboarders and skiers to the summit. One tow rope is powered by a 19.7 kW motor which pulls 16 skiers, of an average mass of 64 kg, along an icy incline of 17.1° at a constant speed. Assume the motor operates at full power.

i) Determine the speed at which the skiers will ascend the hill

Answer 1