1. A 100-lbf vertical force is applied to the end of a lever which is attached to a shaft at O. Determine (a) the moment of the 100-lb, force about O; (b) the horizontal force applied at A which creates the same moment about O; (c) the smallest force applied at A which creates the same moment about O; (d) how far from the shaft a 240-lbf vertical force must act to create the same moment about O. 24 in. 60° 100 lb