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Physics - Gravitation Question with Solution | TestHub

PhysicsGravitationSatellite MotionMedium2 minPYQ_2023

PhysicsMediumsingle choice

The radius of earth is $6400 km$ and acceleration due to gravity $g = 10 ms^{- 2}$ . For the weight of body of mass $5 kg$ to be zero on equator, rotational velocity of the earth must be (in rad/s)

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Answer:

Solution:

At equator, for the weight to be zero, the gravitational force must be equal to centrifugal force. $mR ω^{2} = mg ω^{2} = \frac{g}{R} ω = \frac{g}{R} ω = \frac{10}{6.4 \times 1 0 ^{6}} ω = \frac{1}{800} \frac{rad}{s}$

Stream:MHT_CETSubject:PhysicsTopic:GravitationSubtopic:Satellite Motion

⏱ 2mℹ️ Source: PYQ_2023

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