this should be obvious, but I'm a little confused. Question is, ' If an object weight 100 pounds on the earths surface (4k miles from the center), is moved to 4000 miles above the surface. How much does it weigh?'(adsbygoogle = window.adsbygoogle || []).push({});

f=Gm1m2/r2, so you would square the r, which means you would divide Gm1m2 by 4 correct? So 25 pounds?

2.) An object on the surface of earth that weighs 100 pounds is moved to a planet with 5x the radius and that is 2x as large, how much does the object weigh?

so it would be Gm_{1}m_{2}/r^{2}= 100 lbs.

G(2)m_{1}m_{2}/5^{2}= 2/25 = 1/12.5.-- 100 * 1/12.5 = 8 lbs.

right?

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# Homework Help: Need some quick physics 110 help

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