Question

Give two example where friction in undersirable​

Answer 1

$\huge\frak\red{AnSwer}$

In other applications, such as operation of engines or equipment with bearings and gears, friction is undesirable because it causes wear and generates heat, which frequently lead to premature failure.

Answer 2

Answer:

friction between pen and paper helps us to write..

friction between our foot and ground helps us to walk...