Torque, Lever Arm, and the CW vs CCW Sign Trap

A force that misses the pivot does nothing. A force at the wrong angle does almost nothing. Torque is not just force times distance, it's force times the perpendicular distance, and that one word is where most students lose the problem before they even start. This video builds torque from the real definition: τ = r·F·sin(θ), the lever arm as the perpendicular distance from the pivot to the line of action, and the unit N·m that is not a joule. Then it forces the harder question. Once a beam has multiple forces acting on it from both sides, which way does it actually spin? The fix is a sign convention, counterclockwise positive, clockwise negative, and a habit of summing every torque about one chosen pivot instead of eyeballing it. A full worked example tracks the signs through a three-force beam where the answer flips depending on which side wins, the exact mistake that costs points on this standard. By the end you can compute a torque from any force and angle, and you can find the net torque and its direction on a beam with multiple forces acting at once. Not by guessing the direction first and checking after. By tracking the sign every time.