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Physics - Gravitation Question with Solution | TestHub

PhysicsGravitationEnergy & PotentialEasy2 minPYQ_2020

PhysicsEasysingle choice

A mass $m$ is raised from a distance $2 R$ from the surface of the earth to $3 R$ . Work done to do so against gravity will -

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Answer:

Solution:

$U_{i} = - \frac{G M m}{(2 R + R)}$

$U_{f} = - \frac{G M m}{(R + 3 R)}$

$W = Δ U = U_{f} - U_{f}$

$= \frac{G M m}{12 R} = \frac{G M}{R^{2}} \times \frac{m R}{12}$

$= m g R / 12$

Stream:NTA_ABHYAS_NEETSubject:PhysicsTopic:GravitationSubtopic:Energy & Potential

⏱ 2mℹ️ Source: PYQ_2020

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