I am working with a rotary drive and a linkage system to open and close dampers. I am having trouble recalling how lb-ft and lbf relate. The drive has a rotating shaft with and arm extending from it. The shaft generates 5000 lb-ft of torque and I need to understand what linear force this applies to a connecting rod attached to the opposite end of the 12" arm extending from the shaft. The rotating shaft is in one end of the 12" arm. The arm is horizontal (on the x-axis) and the connecting rod is attached to the other end of the arm and it perpendicular to the arm (on the y-axis). I hope this is clear. Thanks.