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CBSE Class 9 Answered

a ball is dropped from a ballon going up at a speed of 7m/s.if balloon was at height of 60m at the time of dropping the ball,how long will the ball take to reach the ground?
Asked by manvendra singh | 19 Nov, 2013, 08:08: PM
answered-by-expert Expert Answer
The balloon is going up with a speed 7 m/s. Hence, this is the initial speed of the ball in upward direction, that is, u = -7 m/s.
 
s = 60 m
 
Thus, the time to reach the ground is
 
Answered by Romal Bhansali | 20 Nov, 2013, 09:27: AM

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