Question

what make a ball rolling on the ground slow down??

Answer 1

A ball rolling on the ground slows down due to the force of friction.

Reason :
Friction is the resistance that one surface of an object encounters when another one touches it.
The force of friction always acts in the opposite direction to the applied force . It opposes the motion of the body and tries to stop .
Hence the ball slows down and finally stops.

Answer 2

A ball rolling on the ground slows down due to friction acting on it. If the surface on which ball is rolling it smooth, the Ball would cover more distance compared to a rough surface. The air around it would cause a resistance and also Slow it Down.