Question

Friction is wasteful at times so why we need to increase it in some cases?

Answer 1

Answer:

Ok

Explanation:

Though friction has disadvantages but has far more advantages than it . Some advantages of friction are mentioned as follows:-

a) Friction helps to burn a matchstick.

b ) Without friction objects kept on a surface will fall unless they are not perfectly horizontal.

c ) Friction are helpful to write .

Answer 2

Though friction is said to be a waste of energy in most of the times, it is really useful at many times in regular life. ... The friction on the soles of our shoes need to be increased to have better grip on the ground while walking, which helps us to keep balance.