Satellite A has a mass of 1000kg. Satellite B has a mass of 2000kg. BOth are in orbit 250km above the surface of the earth. Satellite A will have an orbital speed that is ____ satellite B.(adsbygoogle = window.adsbygoogle || []).push({});

1. the same as.

2. four times that of.

3. twice that of.

Not really sure on this. I originally said half that of and it was incorrect.

The gravitational force between two masses is 36 N. If the distance between the mass is decreased to one-half its original value, the force of gravity will be:

1. 144 N

2. 9 N

3. 18 N

My original answer was 72 N, and I forgot to square the radius if I remember correctly. So I am fairly confident the answer is 144 N.

Thanks

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# Homework Help: Law of Gravitation

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