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Physics - Gravitation Question with Solution | TestHub

PhysicsGravitationEnergy & PotentialMedium2 minPYQ_2018

PhysicsMediumsingle choice

A satellite is moving with a constant speed $v$ in a circular orbit about the earth. An object of mass $m$ is ejected from the satellite such that it just escapes from the gravitational pull of the earth. At the time of its ejection, the kinetic energy of the object is

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Answer:

Solution:

Escape speed, $v_{e} = 2 \times$ orbital speed $= 2 v$ $∴$ Kinetic energy of the object at the time of ejection $= \frac{1}{2} m v_{e}^{2} = \frac{1}{2} m (2 v)^{2} = m v^{2}$

Stream:AIIMSSubject:PhysicsTopic:GravitationSubtopic:Energy & Potential

⏱ 2mℹ️ Source: PYQ_2018

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