Question

Suppose gravity of earth suddenly becomes zero, then in which direction will the moon begin to move if no other celestial body affects it?

Answer 1

The moon will begin to move away from the Earth as Earth has hold the moon near to it using Gravity .As soon as this happens moon will become free begin to move away from the Earth in any direction.
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Answer 2

Answer:

The moon will begin to move in a straight line in the direction in which it was moving at that instant because the circular motion of moon is due to the centripetal force provided by the gravitational force of earth and if gravitational force becomes zero it means no centripetal force is there to help the moon to move ...

Explanation:

The moon will begin to move in a straight line in the direction in which it was moving at that instant because the circular motion of moon is due to the centripetal force provided by the gravitational force of earth and if gravitational force becomes zero it means no centripetal force is there to help the moon to move in circular orbit. Therefore it will move in a straight line.

The gravitational force exerted by the earth on the moon provides the centripetal force required for the moon to orbit the earth.

When there will be no gravitation pull from the earth, the moon will move in a straight line in the direction of its movement.

So that time, the moon will move towards the direction of its velocity that is along the tangent of its orbit.

The moon will begin to move in a straight line in the direction in which it was moving at that instant because the circular motion of moon is due to the centripetal force provided by the gravitational force of earth and if gravitational force becomes zero it means no centripetal force is there to help the moon to move in circular orbit. Therefore it will move in a straight line.

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