Physics, 07.07.2020 21:01 Weser17

A ball is thrown straight up from the edge of the roof of a building. A second ball is dropped from the roof 2.0 s later. You may ignore air resistance. If the height of the building is 30 m, what must the initial speed be of the first ball if both balls are to hit the ground at the same time

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A ball is thrown straight up from the edge of the roof of a building. A second ball is dropped from...