What Causes Friction?
Friction is caused due to the irregularities on the two surfaces in contact. So, when one object moves over the other, these irregularities on the surface get entangled, giving rise to friction. The more the roughness, the more irregularities and more significant will be the friction.
Types of Friction
There are four types of friction and they are classified as follows:
- Static friction
- Sliding friction
- Rolling friction
- Fluid friction
All four types of frictions are different from each other. For example, static friction is the friction that acts between the surfaces when they are at rest with respect to each other. In contrast, sliding friction is the resistance created between any two objects when sliding against each other.