Physics - Gravitation Question with Solution | TestHub

PhysicsGravitationEnergy & PotentialEasy2 minPYQ_2020

PhysicsEasysingle choice

Find the work done to take a particle of mass $m$ from surface of the earth to a height equal to $2 R$

Answer:

Solution:

We know that work done by a conservative force is equal to change in kinetic energy

$W = Δ U = G M m [\frac{1}{R} - \frac{1}{3 R}]$

$W = \frac{2 G M m}{3 R}$

We know that $g = \frac{G M}{R^{2}}$ .

Hence,

$W = \frac{2}{3} g m R$

Stream:NTA_ABHYAS_NEETSubject:PhysicsTopic:GravitationSubtopic:Energy & Potential

⏱ 2mℹ️ Source: PYQ_2020

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