Question

explain with 3 examples the disadvantages of friction

Answer 1

hey mate

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. 

Answer 2

Friction disadvantages as follows

1.  Friction wear out shoes soles

2. friction wear out machines

3. because of friction car slips and accident occurs