Question

A 1000-kg satellite is in a circular orbit 4000 miles above the earth. The radius of earth is approximately 4000 miles. What is the net force on the satellite?

Answer 1

The force on the satellite is given by:
\[F=(Gm1m2)/r ^{2}\]
where m1 and m2 are the masses of the satellite and earth respectively. r is the distance between the satellite and the center of the earth.
Substitute the given values in the formula, and show me what you get.