Rolling friction is the force that opposes the rolling motion between two surfaces in contact. It is less than sliding friction because when a wheel rolls over a surface, the point of contact has zero velocity relative to the surface, so there is no slipping between the surfaces. This means less force is needed to overcome rolling friction compared to sliding friction. Because rolling friction is less, vehicles with wheels can transport heavy loads more efficiently than sliding loads, and motorcycles can travel farther on the same amount of fuel since their tires roll rather than slide.

1. SUBJECT:PHYSICS
SUBJECT TEACHER: MS.SURUCHI kauchik
MADE BY:RAHUL SHARMA

2. What is rolling friction?

3. 1) The wheel has to over come the
force of attraction as the area of
contact of the body and the surface
is very small.
2) The molecules of rolling body are in
contact with the molecules of the
surface. So wheel has to overcome
the mount hill to move on the
surface.

4. Since, the rolling friction is less , a
motorcycle will cover more distance for
the given petrol consumed in it. Hence
petrol is saved when motorcycle tyres
are fully inflated.

5. This is because when a wheel rolls over a surface the
velocity of the point of contact of the wheel with
respect to the surface is zero.
This means wheel rolls over a surface
without slipping; the surface do not
rub each other at the point of contact.
That is why rolling friction is less than
sliding friction.Therefore heavy loads are
transported by keeping them on vehicles with wheels
and not by sliding them.
Rolling friction is less than sliding friction

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