Question

Describe the disadvantage of friction.

Answer 1

Disadvantages of friction

Despite the fact that the friction is very important in our daily life, it also has some disadvantages like:

$1$. The main disadvantage of friction is that it produces heat in various parts of machines. In this way some useful energy is wasted as heat energy.

$2$. Due to friction we have to exert more power in machines.

$3$. It opposes the motion.

$4$. Due to friction, noise is also produced in machines.

$5$. Due to friction, engines of automobiles consume more fuel which is a money loss.

$6$. Machine efficency is decreased: energy input is lost to heat

$7$. Getting shocked by doorknobs

$8$. Rug burn

$9$. It counteracts movement and so it takes more energy to move, it can cause unwanted heat (e.g. in machine parts), and it wears things out like shoes.

$10$. Forest fires are caused due to friction between branches of trees