a) suppose gravity of Sun suddenly becomes Zero ,then in which direction will the earth begin to move if no other celestial body affects it? b) what is the centripetal force ? c) At what place on the earth's surface in the weight of a body maximum?
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(a) If gravity of sun suddenly becomes zero and If no other celestial body affects it, then the Earth will move tangentially to the elliptical orbit in which it was moving.
(b) Since no other force is acting on it, it will move in a straight line tangentially to the previous orbit. And since it is moving in a straight line and not in a circular path, there will be no centripetal force acting on it.
(c) The weight of a body is maximum at the poles because the gravitational force is maximum at the poles.
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