We know that Earth is undergoing centripetal acceleration due to gravitational pull of sun. If the sun's gravitational force reduced what will happen to the earth,is it thrown away or is attracted by MARS?

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Solution

The earth is moving with constant speed due to effect of centripetal force provided by the gravitational force between the earth and sun. If the centripetal force is suddenly reduced(hypothetical) the earth will move away from its path.

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