Match items in Column A with those in Column B.

Column A	Column B
(i) Friction Produces	(a) Ceiling Fan
(ii) Lubricants	(b) Heat
(iii) Soapy floor	(c) Oil and grease
(iv) Ball bearing	(d) Rolling friction
(v) Wheels	(e) Less the friction

 

Name the force which always opposes motion.

Out of static friction, sliding friction and rolling friction:

Which one is the largest?

Out of static friction, sliding friction and rolling friction:

Which one is the smallest?

The surface of matchbox should be rough. Explain why.

Oiling of the axles of a bicycle make the bicycle moving easily. Comment along with the reason.

Write the use of friction.

Write the condition under which the rolling friction increases.

Give the name of material which reduces the force of friction.