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Revolution of Earth

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A spherical uniform planet is rotating about its axis.The velocity of a point on its equator is v. Due to the rotation of the planet about its axis the apparent acceleration due to gravity at equator is half of that at poles. The escape velocity of aparticle from the pole of the planet in term of v is(1)v_e=v(2) v_e=2v (3) v_e = v/

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