from a balloon which is at height H= 300m above the ground a stone is left to fall freely . How long will it take for the stone to reach the ground 1) balloon is moving up at velocity v= 5m/s 2) balloon is moving down at velocity v= 5m/s 3) balloon is motionless
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Expert's answer
2018-03-16T08:04:07-0400
1) h=-vt+(gt^2)/2 300=-5t+(10t^2)/2 t=8.3 s.
2) h=vt+(gt^2)/2 300=5t+(10t^2)/2 t=7.3 s. 3) h=(gt^2)/2 t=√(2h/g)=√((2(300))/10)=7.8 s.
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