Discuss any specific gadget or device that applies the concept of friction in its operation.

There are almost infinite different application of friction in
common as well as highly sophisticated devices we use. For example, when we strike a match to
light we are using the friction to create the heat required to light the match. While friction
allows the tires of a car to push it forward without slipping, the friction in the brake drum of
a car enables us to bring the car to a stop by applying breaks.

When
we wind a rope round a peg or a pole so that the a load attached to the rope will not slip under
the force of the load we are using friction. As a matter of fact all types of knots in ropes are
able to hold because of friction.

We often use rough surfaces when
people have to walk over a sloped grounds, or where the floor is likely to become slippery by
spilling of water or other reasons. These are devices also use friction to make our lives easier
and safer.

Handles of many equipments and tools are also often made
with the right degree of roughness so that ease and comfort of gripping is combined with the need
ore preventing slipping between the handle and the hand
grip.

Sometime when we are unable to unscrew the cap of a bottle, we
grip the cap with a piece of cloth in between. This increases the friction between the cap and
the hand grip, and thus prevent slipping of grip when more force is applied for
unscrewing.