The earth exerts a force of 2500 N on an or-

biting communications satellite that is 30 mi
above the Earth.
What is the magnitude of the force the
satellite will exert on the earth?
Answer in units of N.

To find the magnitude of the force the satellite exerts on the Earth, we can use Newton's Third Law of Motion, which states that for every action, there is an equal and opposite reaction. In this case, the force that the Earth exerts on the satellite (2500 N) is the action, and the force that the satellite exerts on the Earth (the reaction) is what we need to find.

According to Newton's Third Law, the magnitude of the force the satellite exerts on the Earth will be the same as the magnitude of the force the Earth exerts on the satellite, but in the opposite direction. Therefore, the magnitude of the force the satellite will exert on the Earth is also 2500 N.