# mechanics help, torque

• November 29th 2008, 08:57 AM
Tweety
mechanics help, torque
A uniform rod AB of length 5m and mass 6kg is pivoted at C. where AC=1.5m . calculate the mass of the particle which must be attached at A to maintain equilibrium with the rid horizontal

can anyone tell me if my diagram is correct? because i keep getting the wrong answer!

thank you
• November 29th 2008, 09:01 AM
running-gag
I think that your diagram is not completely correct since the weight should be placed at the middle of AB and not on C
• November 29th 2008, 09:07 AM
Tweety
Okay, I have redrawn it,

so would me equation be

$6g \times 1m = F \times 1.5m$???
• November 29th 2008, 09:10 AM
running-gag
I would say yes !