Question

What are the two important properties of friction?

Answer 1

Friction:

1. Friction is the force that exists between two surfaces that are sliding or attempting to slide against each other.
2. For example, friction makes it difficult to push a heavy box across the floor.

Two important properties of friction:

1. It is determined by the normal reaction between the two surfaces under consideration, as well as the nature of the surface.
2. Inter-molecular interactions between the bodies cause frictional forces.
3. It reduces the relative motion between two bodies or surfaces in all contact.
4. It always operates in the direction that opposes the direction of the motion.