Physics - Gravitation Question with Solution | TestHub

PhysicsGravitationKepler's LawEasy2 minPYQ_2020

PhysicsEasysingle choice

A comet revolves around the sun in an elliptical orbit. When it is closest to the sun at a distance $d$ , its corresponding kinetic energy is $k_{0} .$ If it is farthest from the sun at distance $3 d$ then the corresponding kinetic energy will be

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Answer:

Solution:

$v_{1} r_{1} = v_{2} r_{2} =$ constant

$∴ v_{0} d = 3 d v_{1}$

$\Rightarrow v_{1} = \frac{v_{0}}{3}$

$∴ KE = \frac{1}{2} \frac{m v_{0}^{2}}{9}$

$\Rightarrow KE = \frac{k_{0}}{9}$

Subject:PhysicsTopic:GravitationSubtopic:Kepler's Law

⏱ 2mℹ️ Source: PYQ_2020

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