Q) Suppose two satellites are orbiting the Earth with the same orbital radius and the same period.However, one satellite is 20 times more massive than the other.This is possible, because.(adsbygoogle = window.adsbygoogle || []).push({});

A) the gravitational force is inversely proportional to r^2.

B) the gravitational force is proportional to mass.

The answer is B. The explanation as follows:B says that the mass of a body increases, the force of gravity on that body increases proportionately. However, since F=ma, the net force on the satellite also increases proportionality with mass, and these two effects cancel each other out.

I do not understand where did the F=ma come from and how does it cancel the force of gravity?

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# Homework Help: Need help with physics question please

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