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d Chrome File Edit View History Bookmarks People Window Help MasteringPhysics: Week 8 Secure https session mastering physics com 76229502 College Physics I Week 8 Problem 8.11 Problem 8.11 At the local ski slope, an75,5 kg skier rides a gondolato the top of the mountain. Part A If the lift has a length of 2900 m and makes an angle of 13.9 with the horizontal, what is the change in the gravitational potential energy of the skier-Earth system? Express your answer to three significant figures and include appropriate units. Value Units Submit My Answers Give Up 4) 42% Wed 1:03 PM a E Help Close TAMU previous l 3 of 17 l next s SPCH 1315 Govt Provide Feedbac Continue

Explanation / Answer

The height which the skier covers will be: h = Lsin13.9 = 2900sin13.9 = 696.66 m

therefore, the change in the potential energy of the skier will be: mgh = 75.5(9.8)(696.66) = 515,000 J [corrected to 3 significant figures].

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