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Physics - NLM Question with Solution | TestHub

PhysicsNLMSimple Application of NLMMedium2 minQB

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A ball of mass m is thrown upwards with velocity u. If air exerts an average resisting force F, the velocity with which the ball returns to the initial point is

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Answer:

Solution:

Going up: $a_{1} = g + \frac{F}{m}$ , maximum height $h = \frac{u ^{2}}{2 ( g + F / m )} = \frac{m u ^{2}}{2 ( m g + F )}$ .

Coming down: $a_{2} = g - \frac{F}{m}$ , so $v^{2} = 2 a_{2} h = \frac{( m g - F )}{m} \cdot \frac{m u ^{2}}{( m g + F )}$ .

$v = u \frac{m g - F}{m g + F}$ .

Stream:JEESubject:PhysicsTopic:NLMSubtopic:Simple Application of NLM

⏱ 2mℹ️ Source: QB

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