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A person standing at the top of a cliff, throws a rock upwardsin a straight line with a velocity of 6m/s y it takes 3.25

A person standing at the top of a cliff, throws a rock upwardsin a straight line with a velocity of 6m/s y it takes 3.25 secondsto hit the ground at the bottom of the cliff.

a) From which height was the rock thrown?

b) How long would it take for the rock to hit the ground if therock was thrown straight down with the same velocity?.

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