Write the formula to find the magnitude of the gravitational force between the earth and an object on the surface of the earth.

Imagine the Earth as a big magnet that pulls everything towards it. We can figure out how strong this ‘pull’ is using a special formula. It’s like a math tool that helps us measure the force with which the Earth pulls objects on its surface.

This formula is F = (G x M x m)/(R²)

Now, let’s understand what each part means:
– F is the force of gravity, or simply how hard the Earth pulls on an object.
– G is a number that never changes, kind of like a secret code for gravity 6.674 x 10^-11 Nm²/kg²)
– M is how much stuff the Earth has, its total mass.
– m is the mass of the object, like a ball or anything on the Earth.
– R is the distance from the center of the Earth to where the object is, and when the object is on the Earth’s surface, we usually use the Earth’s radius for R .

When something’s on the Earth’s surface, like us or anything around us, we can use this formula to find out how strong the Earth pulls it down. It’s like finding out the power of the Earth’s magnetism on things placed on its surface.”