A wheel of diameter 2 m is shown in the figure. A force F = 2 N is applied at B in the direction shown in figure. Calculate the moment of force about (i) centre O, and (ii) point A.
2N.m, 4N.m
Moment of force about O (as pivot) = F ´ d = 2 ´ 1 = 2 N.m (clockwise)
Moment of force about A (as pivot) = F ´ d = 2 ´ 2 = 4 N.m (clockwise)