A balloon was moving upwards with a uniform velocity of 10m s ^ - 1 . An object of finite mass is dropped from the balloon when it was at a height of 75m from the ground level. The height of the balloon from the ground

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Correct answer: C. 125m

A balloon was moving upwards with a uniform velocity of 10m s ^ - 1 . An object of finite mass is dropped from the

Object is projected as shown so as per motion under gravity,

$S = ut + \dfrac{1}{2}a{t}^{2}$

$- 75 = + 10t + \dfrac{1}{2} ( - 10 ) {t}^{2} ⇒ t = 5s$

Object takes $t = 5s$ to fall on ground height of balloon from ground,

$H = 75 + ut$

$= 75 + 10 \times 5 = 125m$

A balloon was moving upwards with a uniform velocity of 10m s ^ - 1...

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