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Physics - Gravitation Question with Solution | TestHub

PhysicsGravitationEnergy & PotentialEasy2 minPYQ_2020

PhysicsEasysingle choice

A particle is kept at rest at a distance $R$ (Earth's radius) above the earth's surface. The minimum speed with which it should be projected so that it does not return is

Options:

Answer:

Solution:

According to the conservation of energy,

$K . E. = U_{G}$

$\frac{1}{2} m v^{2} = \frac{G M m}{R + h}$

$\frac{1}{2} m v^{2} = \frac{G M m}{R + R} = \frac{G M m}{2 R}$

Therefore, the escape velocity is,

$v = \sqrt{\frac{G M}{R}}$

Stream:NTA_ABHYAS_NEETSubject:PhysicsTopic:GravitationSubtopic:Energy & Potential

⏱ 2mℹ️ Source: PYQ_2020

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