The girl on the skate ramp roller-skates down one side of the slope and up the opposite side. She cannot quine reach the top of the slope, level with her starting position.

a What energy conversion is taking place as the girl moves downwards?
b What energy conversion is taking place as the girl moves back upwards?
c Explain why the girl cannot reach the top of the slope.
d Suggest how the girl could reach the top of the slope.

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