Question

Is there an equation of finding out the gravitational force exerted on an object, depending how far away from the source is it? If yes, what is it and how can we use it in this question?

If a ball has a mass of 10 kg and is 20 meters away from the ground, assuming earth's average gravity of 9.8 m/s, what is the force exerted on the ball?​

Answer 1

the distance from the surface of earth dosent matter as the mass of earth is very huge so any little change in the denominator is meaningless

but if you want to calculate the force the

accleration due to gravity 9.8*mass of ball
easy way

harder way is to

use GMm/r^2
M mass of earth
m mass of object

r distance from the object to the centre of earth