Gravitation Do you still remember what chapter have you learned previously?It's Circular motion. Let us recall, the circular motion made by any object is due to the centripetal force, Fc and I have explained during the lesson that the Fc is always contributed by other type of force. I believe that all of you still remember the 5 types of force we had in Chapter 4. Yes ! now everything is inter-related.😎 Earth-Sun system To relate with our new topic CH 7 GRAVITATION, let us think of a bigger range of physics, the circular motion made our earth surrounding the sun. In fact, there is a centripetal force possessed by the earth as it is making a circular motion. So, what type of force contributes to the centripetal force?? Note that this type of force is called as Gravitational Force, Fg . It is a type of attractive force that acts on any 2 bodies that have masses m1 and m2 . As long as the bodies have masses, there will be an interaction between the two bodies or ob