9. In another solar system a planet has twice the earth’s mass and threetimes the earth’s radius. Your weight on this planet is ________ times yourearth-weight. Assume that the masses of the earth and of the other planetare uniformly distributed. (a) 0.667 (b) 2.000 (c) 0.111 (d) 0.444 (e) 0.222

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A: gravitaional force F =Gm₁m₂/r²

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A: 900lb is correct answer Detail sol

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Newton's First Law of Motion

If a very smooth ball is rolled down an inclined surface with zero friction, the ball will continue to roll indefinitely for an infinite time, in an attempt to reach to the same height on the opposite hill!