Well, not to be that guy (actually definitely to be that guy) but what Newton discovered was that gravity was proportionnal to the mass of the bodies, and to the inverse of the square of the distance between their center of mass, and this second point seems too difficult to prove for a 9 years old.
Well, not to be that guy (actually definitely to be that guy) but what Newton discovered was that gravity was proportionnal to the mass of the bodies, and to the inverse of the square of the distance between their center of mass, and this second point seems too difficult to prove for a 9 years old.
Idk todays 9 year olds are scary. There are 9 year old chess grand masters.