The earth (mass `=6xx10^(24)kg`) revolves round the sun with an angular velocity of `2xx10^(-7)"rad/s"` in a circular orbit of radius `1.5xx10^(8)km.`
The earth (mass `=6xx10^(24)kg`) revolves round the sun with an angular velocity of `2xx10^(-7)"rad/s"` in a circular orbit of radius `1.5xx10^(8)km.` The gravitational force exerted by the sun on the earth, in newtons, is
A. zero
B. `18xx10^(25)`
C. `27xx10^(39)`
D. `36xx10^(21)`
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Correct Answer - C
`F=mR omega^(2)=6xx10^(24)xx1.5xx10^(11)(2xx10^(-7))^(2)`
`=36xx10^(21)N`
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