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Q. A golf ball is thrown straight up from the edge of the roof of a building. A second golf ball is dropped from the roof a time of 1.15 s later. You could ignore air resistance.

If the height of the building is 20.9m, what should the initial speed be of the first ball if both are to hit the ground at same time?

Determine the same situation, but now let the initial speed v0 of the first ball be given and treat the height h of the building as an unknown. What should the height of the building be for both balls to reach the ground at the same time for v0= 8.80 m/s.

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Category:- Physics
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