ABSTRACT
Newton’s law states that the magnitude of the gravitational force between two masses m1 and m2 separated by a distance r is given by
Fg D Gm1m2 r2
: Newton’s Law (9.2)
where G D 6:7 1011m3=.kg s2/ is the gravitational constant, and the direction of the force is along the line joining the two masses (see also Chapter 1).
