webassign net Prerequisites I UDM Col Physics question Cheg Trust Me, I\'m a PA
ID: 1526503 • Letter: W
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webassign net Prerequisites I UDM Col Physics question Cheg Trust Me, I'm a PA Stude... Graduate School Wayn... cnzabelaoaklan. EXAMPLE 5.4 Wax Your Skis Goal Calculate the change in gravitational potential energy for different choices of reference level Problem A 60.0 kg skier is at the top of a slope, as shown in the figure. At the initial point 3, she is 10.0 m vertically above point B. (a) setting the zero level for gravitational potential energy at find the gravitational potential energy of this system when the skier is at and then a ® Finally, find the change in potential energy of the skier-Earth 0.0 m. system as the skier goes from point to point B. (b) Repeat this problem with the zero level at point A. Repeat again, with the zero level 2.00 m higher than point ® Strategy Follow the definition and be careful with signs is the initial point, with gravitational potential energy PE and is the final point, with gravitational potential energy PEf. The location chosen for y 0 is also the zero point for the potential energy, because PE may. SOLUTION (a Let o at D. Calculate the potential energy at and at D, and calculate the change in potential energy. PE mayi 60.0 kg)(9.80 m/s 10.0 m) Find PE, the potential energy at 5.88 x 103 J PE 0 at by choice. Find the PE, PE, 5.88 x 10 5.88 x 103 J difference in potential energy between and (b) Repeat the problem if y 0 at O, the new reference poin so that PE 0 at Find PEy, noting that point is now at PE 60.0 kg)(9.80 m/s 10.0 m 10.0 m. 5.88 x 10 J PE, PE, 5.88 x 10 y-o- 5.88 x 103 J (c) Repeat the problem, if y o two meters above Phy 101 W17 Chapter 5 https://moodle.oakland.... DashboardExplanation / Answer
a) PEi = 54 * 9.8 * 9 = 4762.8 J
PEf = 0 J
delta PE = 0 - 4762.8 = - 4762.8 J
b) PEi = 0 J
PEf = 54 * 9.8 * 9 = - 4762.8 J
delta PE = - 4762.8 J
c) PEi = 54 * 9.8 * 7 = 3704.4 J
PEf = - 54 * 9.8 * 2 = - 1058.4 J
delta PE = - 1058.4 - 3704.4 = - 4762.8 J
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