/sci/ - Science & Math

>>5728634
Newtons Laws of motion are a good place to start to understand this. When 2 objects are at rest there are still forces acting on them and as it isn't moving there is an opposing to every force acting on it, so its in a state of equilibrium.
To get 2 objects to slide over one another you need to overcome forces that will oppose the change and introduce another force like you forcing your hands back and forward.
Objects have a coefficient of friction. Heavy objects will have bigger coefficient, and so do hands when you apply more pressure.
Losses in the force you apply to do the rubbing (due to the coefficient of friction x applied force in newtons) causes hands to slow down and some is released as heat. If you want to know more than that look into thermodynamics on a good physics page