If you have an object and you drop it from a high altitude (that is, its velocity is zero, then it accelerates.) and I lower it one second later at zero speed, that object will accelerate at 9.80 m/s per second.” DEAR WALTER LEWIN
Accordingly, what can be said about gravity? GET A ZERO M/S SPEED BALL DROPPED FROM A HEIGHT OF 100 METERS. So what can we take from here? From here we deduce:
Gravity is caused by acceleration. Gravity is equal to accelerated motion, and we can deduce it from here. Because the speed of the matter, the ball, has increased and decreased by one. and so gravity was formed. a=g thanks.