1. The problem statement, all variables and given/known data How much torque must the pin exert to keep the rod from rotating if the rod has a length L=65cm and a mass m=2.0kg? Calculate this torque about an axis that passes through the point where the pin enters the rod and is perpendicular to the plane of the figure. http://i241.photobucket.com/albums/ff4/alg5045/p13-25alt.gif 2. Relevant equations 3. The attempt at a solution I haven't attempted the problem because I'm not quite sure where to start. I know that you have to find Tnet, and I know the mass and the length fit into the equation somewhere. I'm just not sure how to set the equation up.