Calculate the GPE of a rock with a mass of 55kg on a cliff that is 27m high

P=mgh

P=mghm=55

P=mghm=55g=9.8 or ~10

P=mghm=55g=9.8 or ~10h=27

Explanation:

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c because the action was the roller coaster reaches bottom of hill (action) reaction would be blood tends to drain away from head

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wavelength divides in half and speed stays the same.