- #1

- 99

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## Homework Statement

Please see attachment.

## Homework Equations

Summation F(x)=0

Summation F(y)=0

Summation tau=0

## The Attempt at a Solution

Please see attachment.

I know how to calculate the problem but I don't know the last part of the solution why the examinar choose mu(min)=1. Please help me.Thank you.