Calculate the torque about the pivot point, marked with an "X," due only to the hanging mass of 5.00 kg.

Calculate the torque about the pivot point, marked with an "X," due only to the hanging mass of 5.00 kg.

In this case, the force is given as being perpendicular to the distance along the beam. A simple technique for finding the moment arm is to extend the force you are examining, in this case the hanging weight, and draw line from the pivot point to the extened line. Remember the distance and force vectors need to be perpendicular to each other.