Physics, orbit problem?

Posted on 2015-09-24 06:20:00 in Physics by SELIZA

Scientists want to place a 3700 kg satellite in orbit around Mars. They plan to have the satellite orbit a distance equal to 1.8 times the radius of Mars above the surface of the planet. Here is some information that will help solve this problem:
mmars = 6.4191 x 1023 kg
rmars = 3.397 x 106 m
G = 6.67428 x 10-11 N-m2/kg2

What is the force of attraction between Mars and the satellite?

What speed should the satellite have to be in a perfectly circular orbit?

How much time does it take the satellite to complete one revolution?

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