1. HELLSGUARDIAN Group Title

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 Group Title

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3. Mathhelp346 Group Title

whats n

4. HELLSGUARDIAN Group Title

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

5. Mathhelp346 Group Title

ok thank you

6. HELLSGUARDIAN Group Title

7. SWdrafter Group Title

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 Group Title

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

9. SWdrafter Group Title

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

10. Mathhelp346 Group Title

so since its constant it does not change

11. SWdrafter Group Title

that is correct

12. Mathhelp346 Group Title

and what do you mean by normal dry friction?

13. SWdrafter Group Title

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

14. Mathhelp346 Group Title

oh ok thank you

15. SWdrafter Group Title

Thanks for the medal.

16. SWdrafter Group Title