1. HELLSGUARDIAN

yes it does..as by adding weight the amount of normal reaction acting increases and hence frictional force also increases..as $F =\mu N$ and N is Directly proportional to weight..

2. HELLSGUARDIAN

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3. Mathhelp346

whats n

4. HELLSGUARDIAN

Normal reaction..the reaction which is acting on a body having weight..

5. Mathhelp346

ok thank you

6. HELLSGUARDIAN

7. SWdrafter

The increase of weight only results in the increase of the frictional force not the coef. of friction for this case. Note that the u is a constant.

8. Mathhelp346

does it not increase because the coefficient of friction is a ratio? that's the definition i have for coefficient of friction

9. SWdrafter

The ratio is derived from the observed frictional force and normal force. For normal dry friction this ratio remains constant.

10. Mathhelp346

so since its constant it does not change

11. SWdrafter

that is correct

12. Mathhelp346

and what do you mean by normal dry friction?

13. SWdrafter

This is between to surfaces with no lubricant in between them.

14. Mathhelp346

oh ok thank you

15. SWdrafter

Thanks for the medal.

16. SWdrafter