Torque at certain points (equilibrium)

[fobbz]

Homework Statement

http://img841.imageshack.us/img841/7360/torques.png

Uploaded with ImageShack.us

Homework Equations

τ=rl
τ_cw=τ_ccw
sum forces up = sum forces down

The Attempt at a Solution

I'm just not understanding how I would find torque at point B? or whether or not point A is the same? I'm assuming it isn't since the distances are different (the lever arms?)

I don't really know what to think when starting however

F₁+F₂ = F_g

but in terms of the torque I don't know how to find F₁ or F₂

 

[DukeLuke]

To find torque you need some reference axis. So for example it would make sense to find the torque due to F2 about A. Asking to "find F1 and F2 at A" doesn't make sense. Is this the question as given or your interpretation of it? Also the torque only sums to zero if the beam is stationary which you don't specify.

 

[fobbz]

To find torque you need some reference axis. So for example it would make sense to find the torque due to F2 about A. Asking to "find F1 and F2 at A" doesn't make sense. Is this the question as given or your interpretation of it? Also the torque only sums to zero if the beam is stationary which you don't specify.

Thanks, yeah I need to take a reference point, which was A, I got it.