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Physics - Gravitation Question with Solution | TestHub

PhysicsGravitationEnergy & PotentialMedium2 minPYQ_2013

PhysicsMediumsingle choice

A particle of mass ' $m$ ' is kept at rest at a height $3 R$ from the surface of earth, where ' $R$ ' is radius of earth and ' $M$ ' is mass of earth. The minimum speed with which is should be projected, so that it does not return back, is $(g$ is acceleration due to gravity on the surface of earth)NEET 2013 (Karnataka)

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Answer:

Solution:

Escape velocity $V_{e} = \frac{2 GM}{( R + h )}$ from the question $h = 3 R$ $∴ V_{e}^{'} = \frac{2 GM}{R + 3 R} = \frac{2 GM}{4 R} = \frac{GM}{2 R} = \frac{g R}{2} where g = \frac{GM}{R ^{2}}$

Stream:NEETSubject:PhysicsTopic:GravitationSubtopic:Energy & Potential

⏱ 2mℹ️ Source: PYQ_2013

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