Name: Necessity of Friction
Uploaded: 2019-07-19
Duration: 4 min 40 s
Description: This video enables students to learn about friction, friction used in routine activities, loss of energy in the form of heat due to friction.

Question

State the causes of rolling friction.

Accepted Answer

Rolling friction arises due to the following two reasons:

The rolling body deforms the surface to some extent on which it rolls, and

The rolling body itself gets deformed at its point of contact with the surface.

For example, when a car is moving on the road, the wheels of the car act as rollers that roll on the road. Now, the tyres of the car cause a slight deformation on the road. However, this deformation will be so small that we cannot see it. At the same time, the tyres themselves get deformed at their point of contact with the road. When the wheel is hard and the road is also hard, then the deformation will be less and hence the rolling friction will also be less.

State the causes of rolling friction.

Important Questions on Friction

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