Physics - Gravitation Question with Solution | TestHub

PhysicsGravitationField & ForceEasy2 minPYQ_2023

PhysicsEasysingle choice

Two planets $A$ and $B$ of radii $R$ and $1.5 R$ have densities $ρ$ and $ρ /2$ respectively. The ratio of acceleration due to gravity at the surface of $B$ to A is :

Options:

Answer:

Solution:

Acceleration due to gravity,
$g = \frac{GM}{R ^{2}} = \frac{4}{3} π G ρ R$
$∴ \frac{g _{2}}{g _{1}} = \frac{ρ _{2}}{ρ _{1}} \times \frac{R _{2}}{R _{1}} = \frac{1}{2} \times 1.5 = \frac{3}{4}$

Stream:BITSATSubject:PhysicsTopic:GravitationSubtopic:Field & Force

⏱ 2mℹ️ Source: PYQ_2023

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