Question #300542
A balloon is rising vertically upward with a uniform velocity 'u' as shown At a certain instant, a ball No. 1 is dropped trom it, which takes a 4 seconds to reach the ground. The moment this ball strikes the ground, another ball is dropped from the balloon and this 2nd ball takes 5 seconds to reach the ground. Find the velocity of the balloon 'u' and height from which both the balls must have been dropped.
Expert's answer
The initial velocity with respect to ground will be 10+5=15m/safter 2sec its velocity will be v=15−gt=15−10×2=−5m/sWhose value is 5m/sNote- Once the stone is projected from balloon it will not have any impact of the balloon after that moment.
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