Torque on a bar suspended from a cord at distance D from the pin

[PrideofPhilly]

More torque yay!

Homework Statement

A horizontal bar with a mass m suspended from one end is held by a cord with tension T, fastened at a distance D from the end of the bar that is attached to a wall with a frictionless pin. What is the torque about the pin exerted on the bar by the cord?

Homework Equations

torque = rF

The Attempt at a Solution

My answer is DTsin(theta.

Am I right or way off?

 

[LowlyPion]

Since they only want the torque from the cord, (you can ignore the mass of the bar and the torque generated from its weight), then your answer is OK.

When the angle with the wall is zero or 180, there is no torque.