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(Solved): These calculations show that the change in the gravitational potential energy when the skier goes fr ...
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 -5.88 103 J, regardless of the zero level selected.
QUESTION If the angle of the slope is increased, the change of gravitational potential energy between the two heights: (Select all that apply.)
remains the same.
depends only on the difference between the two heights.
depends on the path followed.
decreases
.increases.
sometimes decreases and sometimes increases
Use the worked example above to help you solve this problem. A diver of mass drops from a board 8.00 above the water's surface, as shown in the figure. Neglect air resistance. (a) Use conservation of mechanical energy to find his speed above the water's surface. (b) Find his speed as he hits the water. EXERCISE HINTS: GETTING STARTED | Use the values from PRACTICE IT to help you work this exercise. Suppose the diver vaults off the springboard, leaving it with an initial speed of upward. Use energy conservation to find his speed when he strikes the water. What would be the final speed of the diver if the initial speed were zero (as in the example, part (b))? Do you expect the final speed in this case to be larger or smaller than that value?