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An apple falls from a tree because of gravitational attraction between the earth and apple. If  is the magnitude of force exerted by the earth on the apple and  is the magnitude of force exerted by apple on earth. Then is very much greater than  is very much greater than  is only a little greater than  and  are equal

Question

An apple falls from a tree because of gravitational attraction between the earth and apple. If  is the magnitude of force exerted by the earth on the apple and  is the magnitude of force exerted by apple on earth. Then is very much greater than  is very much greater than  is only a little greater than  and  are equal

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Solution

The forces exerted by the earth on the apple and by the apple on the earth are equal. This is according to Newton's third law of motion, which states that for every action, there is an equal and opposite reaction. So, the magnitude of the force exerted by the earth on the apple is equal to the magnitude of the force exerted by the apple on the earth.

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