A 52 kg skier is at the top of a slope. At the initial point A, the skier is h =

Question

A 52 kg skier is at the top of a slope. At the initial point A, the skier is h = 9.9 m vertically above the final point B. (a) Set the zero level for gravitational potential energy at B, and find the gravitational potential energy associated with the skier at A and B. Then find the difference in potential energy between these two points. PEA = PEB = difference in PE = (b) Repeat this problem with the zero level at A. PEA = PEB = difference in PE = (c) Repeat this problem with the zero level midway down the slope, at a height of 4.95 m. PEA = PEB = difference in PE =

Explanation / Answer

At A : PE = mgh = 5050.188 J At B : PE = 0 PEa - PEb = 5050.188 J Case 2 At A : PE = 0 At B PE = -5050.188 J PEa - PEb = 5050.188 J Case 3: PE a = 2525.094 J PE b = -2525.094 J PE a - PE b = 5050.188 J Hence all are equal

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