Minimum distance to hang weight on rod supported by cable and friction

[voko]

Alright I got the right answer using your value. I'm not sure how you got it though. That seems to be new to me.

[cos30-(sin30/-μ)]F_B = 3w/-μ

F_B = [(-3w/-μ)/(cos30-(sin30/-μ)]

This is almost exactly the equation I got. Just multiply the numerator and denominator by $\mu$.

F_B = (-3w/-μ)[(1/cos30)-(-μ/sin30)

This is wrong. You cannot go from $\frac {a} {b + c}$ to $a(\frac 1 b + \frac 1 c)$, these are not equal.

As for the tool, click the Quote button on my message, you will see some code there. That code is LaTeX. When you are in (advanced) reply screen, there is a $\sum$ button, which you can use to find codes for whatever math symbol you need. Or you can just search for a LaTex reference online.

 

[burnst14]

Alright thank you. Oh okay. I'll use that next time. Thanks for all the help. This forum is great.