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Gravitation: Earth's Orbit

Q- The earth orbits the sun at a distance of about 1.5*1011 m in about 365 days (3.15*107 s).

(a) What is the earth’s speed along its orbital path?

(b) If the mass of the earth is 6*1024 kg, find the force exerted on it by the sun to keep it in orbit.

(c) What must be the mass of the sun to exert this much force on the earth?

Solution:

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