Question

A nut is tightened using a spanner of length 20 cm by applying a force of 15 N perpendicular to its handle at the free end. The moment of this force about the nut is:

Two equal, opposite and parallel forces, each of magnitude 8 N, act at the two ends of a rigid rod of length 50 cm and form a couple. The moment of this couple is:

Assertion (A): A door is easier to open when its handle is fixed near the edge farthest from the hinges. Reason (R): The moment of the applied force about the hinge increases when the perpendicular distance between the line of action of the force and the hinge is increased.