# Torque beam problem?

1. Sep 10, 2008

### gnsdraw

Torque beam problem????????

|\
| \
| \ rope
| \
| \
|wall \
| \
|......beam...37*
x |w

a beam is being held up by the rope due to the friction of the wall. the beam has a weight W, and a man is standing x distance away from the wall. the coefficient of friction with the wall is 1/2, the angle is 37*. what is the maximum distance towards the wall that the man can stand without falling.

i dont know how to start, the only thing i can think of is to use the torque at the angle =[

pic got messed up, rope on angle, wall on left

2. Sep 11, 2008

### tiny-tim

Hi gnsdraw!

(hmm … use CODE tags … )
Code (Text):

|\
| \
|  \ rope
|   \
|    \
|wall \
|      \
|......beam...37*
x |w
Hint: call the normal force N the friction force F and the tension force T.

When the beam is about to slip, F/N will be exactly 1/2, won't it?

So take horizontal and vertical components of all the forces acting on the beam.

3. Sep 11, 2008

### gnsdraw

Re: Torque beam problem????????

so along with fric force and tension, there are also gonna be two weights? could anyone show me how to set the torques up