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We know that the Earth moves about the Sun due to the gravity force exerted by...

We know that the Earth moves about the Sun due to the gravity force exerted by the Sun, that is, the Earth is a “satellite” to the Sun, just like the moon to the Earth. Assume the Earth follows uniform circle motion about the Sun, and ignore gravity force due to objects other than the Sun. Estimate the orbital speed of the Earth = _______ m/s?

The Earth has mass =5.98 x 1024 kg and radius 6.4 x 106 m.
The Sun has mass 1.99 x 1030 kg and radius 7 x 108 m.
The center-to-center distance between the Sun and the Earth is 1.5 x 1011 m.

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