Question

4. Why is sliding friction less than static friction?
And why is rolling friction less than sliding
friction?​

Answer 1

Q. Why is sliding friction less than static friction?

Ans. When a body is sliding, the force which is applied on the the object makes it slide on a frictional surface it means that the force can overcome the friction, but in static friction the force which is applied on the object does not makes its slide on a frictional surface and the body gets locked in the surface and the force does not overcome that friction and therefore more force is needed to move the body therefore sliding friction is less than static friction.

Q. Why is rolling friction less than sliding friction?

Ans. When a body rolls on a frictional surface the Area of contact is less in the case of rolling and when a body slides on a frictional surface the contact of the body is more from the surface and hence it gets locked by the frictional surface but the force moves it, therefore in short we can say a rolling body overcomes the friction but sliding body go through friction.