LEARN MDRE REMARKS These calculations ShOW that the change in the gravitational potential energy when the skier goes from the top of the slope to the bottom is -5.88 X 103 J, regardfess ofthe zero i'evei selected. QUESTION If the angle of the slope is increased, the change of gravitational potential energy between the two heights: {Select all that apply.) I:l increases. l:l remains the same. D depends only on the difference between the two heights. D depends on the path followed. I:l decreases. l:l sometimes decreases and sometimes increases. PRACTICE IT Use the worked example above to help you solve this problem. A 151.0 kg skier is at the top of a slope, as shown in the figure. At the initial point @, she is 12.1] m vertically above point @. {3] Setting the zero level for gravitational potential energy at @, find the gravitational potential energy of this system when the skier is at and then at @. Finally, find the change in potential energy of the skier Ea rth system as the skier goes from point @to point @. f (b) Repeat this problem with the zerolevel at point @. f (c) Repeat again, with the zero level 2.00 rn higher than point @. EXERCISE HINTS: GETTING STARTED | I'M STUCK! Use the values from PRACTICE IT to help you work this exercise. If the zero level for the gravitational potential energy is selected to be midway down the slope, 6.00 m above point , find the initial potential energy, the final potential energy, and the change in potential energy as the skier goes from point A to B in the figure. initial kJ final kJ change KJ