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An object has a weight W when it is on the surface of a planet of radius R.

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An object has a weight W when it is on the surface of a planet of radius R. What will be the gravitational force on the object after it has been moved to a distance of 4R from the center of the planet? 

(A) 16W 

(B) 4W 

(C) W 

(D) 4 

(E) 1/16W

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Correct option (E) 1/16W

Force is inversely proportional to distance between the centers squared. R × 4 = F ÷ 16.

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