Fill in the blanks below:
1. Mention one use of torque.
Since there is a difference in the of the persons sitting on a seasaw, the person lifts the lighter person. When the heavier person comes closer to the pivot point (fulcrum) the distance of the line of action of the force . It causes less amount of torque to act on it. This enables the lighter person to lift the heavier person.
2. Sign convention of moment of a force or couple.
According to convention, anti-clockwise rotation is considered as .