A steady 3.0-lb force is applied normal to the handle of the hand-operated grinder. The gear inside the housing with its shaft and attached handle together weigh 3.56 lb and have a radius of gyration about their axis of 2.75 in. The grinding wheel with its attached shaft and pinion (inside housing) together weigh 1.09 lb and have a radius of gyration of 2.22 in. If the gear ratio between gear and pinion is 7:1, calculate the speed N of the grinding wheel after 7 complete revolutions of the handle starting from rest.