The earth of mass `6xx10^(24)kg` revolves round the sun with angular velocity `3xx10^(-7)"rad/s"` in a circular orbit of radius `1.5xx10^(8)km.`` Then
The earth of mass `6xx10^(24)kg` revolves round the sun with angular velocity `3xx10^(-7)"rad/s"` in a circular orbit of radius `1.5xx10^(8)km.`` Then the force exerted by the sun on the earth in newtons, is
A. `18xx10^(25)`
B. `36xx10^(18)`
C. `36xx10^(21)`
D. `81xx10^(21)`
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Correct Answer - d
`F=mr omega^(2)`
`=6xx10^(24)xx1.5xx10^(11)xx9xx10^(-4)`
`=81xx10^(21)`
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