Ball is thrown straight up from edge of roof of building

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Reference no: EM13671661

A ball is thrown straight up from the edge of the roof of a building. A second ball is dropped from the roof a time of 1.20 s later. You might ignore air resistance. If the height of the building is 20.1 m, what should the initial speed be of the first ball if both are to hit the ground at the same time?

Reference no: EM13671661

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