Humans throughout history have been toolmakers. Although modern tools tend to be more complex than those of the past, many are actually modifications of ancient tools. The movement of force causes heat. This is friction. Today, we are going to talk about the relationship of friction and the functioning of machines.
Friction is a force produced by rubbing, that resists motion.
One must push with a lot of force to move the full box. One must also overcome the inertia of the box. One must overcome the force of friction created by the box rubbing against the floor. The larger the mass of the box, the greater its friction. The kind of surface also affects the force of friction.