Cause of Rolling Friction
Rolling friction arises from several factors related to the interaction between a rolling object and the surface over which it rolls. The main causes of rolling friction include:
Deformation of Surfaces: When a wheel or a cylindrical object rolls over a surface, both the object and the surface undergo deformation. The surface deforms slightly under the pressure of the rolling object causing rolling friction to the wheel.
Elastic Hysteresis: Elastic hysteresis is the loss of energy that occurs when an elastic material, such as rubber, undergoes deformation and then returns to its original shape. As the tire or wheel rolls over the surface, it undergoes repeated cycles of compression and expansion, causing energy to be dissipated as heat. This also causes rolling friction.
Internal Friction: Internal friction within the material of the rolling object, such as the rubber in tires, also contributes to rolling resistance. As the tire rolls, internal friction within the tire material generates heat and dissipates energy, increasing the resistance.
Surface Irregularities: Surface irregularities, such as roughness, bumps, and imperfections, on both the rolling object and the surface over which it rolls can increase rolling friction.
Adhesion and Cohesion: Adhesion and cohesion between the rolling object and the surface can also contribute to rolling friction. Molecular interactions between the materials of the rolling object and the surface can create adhesion and cohesion forces, which resist the motion of the rolling object and increase rolling resistance.
Rolling Friction
Rolling Friction is a frictional force that opposes rolling objects. Rolling friction is applicable where the body moves along its curved surfaces. For example, wheels in vehicles, ball bearings, etc. are examples of rolling friction.
In this article, we will learn about rolling friction, its definition, laws, formulas, causes, coefficient, and the factors that affect it. We will also learn how rolling friction is different from sliding friction.
Table of Content
- What is Rolling Friction?
- Laws of Rolling Friction
- Rolling Friction Formula
- Cause of Rolling Friction
- Coefficient of Rolling Friction
- Factors Affecting Rolling Friction