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A ball (A) is thrown straight upfrom the...

A ball (A) is thrown straight upfrom the edge the roof of a building. Another ball (B) is dropped from the of `1.00 s` later. You may ignore air resistance . (a) If the height of the building id `20.0 m`, what must the initial speed of ball (A) he if bothe are to hit the ground at the same time? (b) On the function of time, measured fro when the first ball is thrown and take origin at ground.
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