Friday, 11 May 2012

Newtons law of universal gravitation problem (easy problem with answer please help explain it)?

Question by : Newtons law of universal gravitation problem (easy problem with answer please help explain it)?
A spherically symmetric planet has four times the Earth's mass and twice its radius. If a jar of peanut butter weighs 12 N on the surface of the Earth, how much would it weigh on the surface of this planet?
A) 6.0 N
B) 12 N
C) 24 N
D) 36 N


The answer is B 12 N...please explain thank you


Best answer:
Answer by dan1221nadGravity reduces in magnitude with the *square* of

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