Tension Physics Help: Solve for T with mg/ma Equations

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Homework Statement



3. A plank of length L=1.800 m and mass M=7.00 kg is suspended horizontally by a thin cable at one end and to a pivot on a wall at the other end.The cable is attached at a height H=1.50 m above the pivot and the plank's CM is located a distance d=0.700 m from the pivot. Calculate the tension in the cable.

Homework Equations



T=mg
T=ma
T-ma=mg

The Attempt at a Solution



how do you solve for tension with the values given? they don't fit into any equations I have..
 

Discussion

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You need the equations for static equilibrium.
 
what are those?
 
Did you learn the principle of moments on your course?