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Gravitation

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 objects. The bigger the product(mathematical operation) of the two masses, the bigger the gravitational force( Fg)🌎. Knowing that the equation of Fg is given by:

Equation for gravitational force

In a smaller range, if you are standing next to a person, you supposed to be attracted to the person next to you as both have masses. But why did not you feel this attractive force?😲. It is because the gravitational force between you and the earth is much bigger than the Fg between you and your neighbor due the very high mass of the earth (~ almost 10^24 kg). Hence, the Fg between 2 persons standing up on the surface of earth is kind of negligible.

Hope you've got the main idea of this topic through this entry.

Thank You🌷

Mdm Ummi Atiah Mohamad
 KMPk


                                                    ~ May it Benefits You ➽💕

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