. Human physiology : designed for colleges and the higher classes in schools, and for general reading. SECOND KIND OF LEVER. THE MUSCLES. iy» Motion of the foot in walking. from the ground in walking. In doing this the to beraised is the whole body, the foot being the lever, and theforward part of the foot being the fulcrum. This will be madetlear by Fig. 109. W is the large bone of the leg sustaining FIG. the weight of the body; F, is the fulcrum, the forward part of thefoot that presses on the ground as the heel is raised; and P, isthe large muscle in the calf of the leg, the p
. Human physiology : designed for colleges and the higher classes in schools, and for general reading. SECOND KIND OF LEVER. THE MUSCLES. iy» Motion of the foot in walking. from the ground in walking. In doing this the to beraised is the whole body, the foot being the lever, and theforward part of the foot being the fulcrum. This will be madetlear by Fig. 109. W is the large bone of the leg sustaining FIG. the weight of the body; F, is the fulcrum, the forward part of thefoot that presses on the ground as the heel is raised; and P, isthe large muscle in the calf of the leg, the power that raisesthe heel, the end of the lever. 298. In the third form of lever the power is between theweight and the fulcrum. A common example of this is seenin the raising of a ladder. The fixed foot of the ladder is thefulcrum, the ladder itself is the weight, and the power is ap-plied as far from the fulcrum as it can be. Fig. 110, represents fig. no.
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