An object has a weight of 40 N when it is at a height of 1600 km above the surface of the earth. The same object is taken to planet X which has a radius three times that of the earth. On the surface of that planet, the same object has a weight of 160 N. Find mass of the planet X.
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Explanation:
Acceleration due to gravity on the moon is 1/6 times as that on the earth and we know that mass is property of the material it always remains same and weight is measure of gravitational force, hence
mass of object on moon is 60kg and weight =60g/6=10×10=100N
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