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Physics - Gravitation Question with Solution | TestHub

PhysicsGravitationEnergy & PotentialEasy2 minPYQ_2021

PhysicsEasysingle choice

The mass of a spherical planet is 4 times the mass of the earth, but its radius (R) is same as that of the earth. How much work is done in lifting a body of mass $5 kg$ through a distance of $2 m$ on the planet? $(g = 10 ms^{- 2})$

Options:

Answer:

Solution:

$g = \frac{GM}{R ^{2}}, g^{'} = \frac{GM ^{'}}{R ^{2}} = \frac{G \times 4 M}{R ^{2}} = 4 g W = mg h = 4 mgh = 4 \times 5 \times 10 \times 2 = 400 J$

Stream:MHT_CETSubject:PhysicsTopic:GravitationSubtopic:Energy & Potential

⏱ 2mℹ️ Source: PYQ_2021

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