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Assume that the earth and the moon have circular orbits (which is almost true) and that the periods of their orbits are 365 days and 28.0 days, respectively

How much work does the earth do on the moon in one day?

W(earth)= ? J

How much work does the sun do on the earth in one month?

W(sun)= ?J

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Force of gravitation F exerted by the earth on moon acts towards the centre of the circular orbit of the moon (i.e. ...

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