Question

What are the ways of reducing and increasing friction?

Answer 1

increasing-increasing surface area
increasing roughness
increasing mass

Answer 2

Answer:

❀ʀᴇǫᴜɪʀᴇᴅ ᴀɴsᴡᴇʀ:

⇒Increasing (Advantage)

Sportsman like athlete (use some special soles for better grip), Kabaddi players (rub their hands with soil for a better grip of their opponents; Gymnasts (apply some coarse substance on their hands to increase friction for better grip.

⇒Decreasing (Advantage) :

To decrease the wear and tear on the machines, we use oil, greases, lubricates, and ball bearings then the movement becomes smooth and even in some machines air cushion are used to reduce friction.

$\sf\blue{hope \: this \: helps \: you!! \: }$