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A ball is dropped from the top of a cliff. the height of the cliff is...

A ball is dropped from the top of a cliff. the height of the cliff is 1000m.

a) how long does for the ball to hit the ground if the cliff is on earth (g= 9.80 m/s^2)?

b) how long does it take if its on the moon (g= 1.60 m/s^2)?

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