Question

use the knowledge of effect of roughness on frictional force in day to day life​

Answer 1

Answer:

It's not a in the form of question.....

Explanation:

So I can't understand what you're trying to say.....

Definitely you'll get a correct answer for this question.....

Answer 2

Answer:

• We put powder as a lubricant while playing Carroms.
• Grease is applied to the moving parts of machines to reduce friction.
• Smooth tyres are used in F1 cars to decrease friction.
• We put oil in hinges of doors and windows for easier movement.
• Car tyres are treaded to increase friction with road.
• Writing papers are rough to ensure ink us spred evenly by the pen.