. The Family tutor . aced underneath a stone, and the end of thebar raised, it becomes a lever of the second kind, the end resting on the ground beingthe fulcrum, the stone the resistance, and the upward movement of the mans hand thepower.—W. T. K.] In the third, the power is between the weight and the fulcrum. Fig. 150. [This kind of lever possesses cer-tain advantages over the two former, becausewhat is lost in power is gained in velocity, asmall power causing the long arm of thelever to move over a great space ; of coursewhen we say that what is lost in power isgained in velocity, we only s
. The Family tutor . aced underneath a stone, and the end of thebar raised, it becomes a lever of the second kind, the end resting on the ground beingthe fulcrum, the stone the resistance, and the upward movement of the mans hand thepower.—W. T. K.] In the third, the power is between the weight and the fulcrum. Fig. 150. [This kind of lever possesses cer-tain advantages over the two former, becausewhat is lost in power is gained in velocity, asmall power causing the long arm of thelever to move over a great space ; of coursewhen we say that what is lost in power isgained in velocity, we only speak compara-tively ; a familiar example of this class is aman using a flail with both hands. The, J 1 . , *^ig-150- treddleof a turning-lathe is another example, the end which rests on the ground is the fulcrum, the foot of tlie man which presseson the board, near the fulcrum, is the power, and the crank upon the axis of the fly-wheQ], which is attached to the other end is the weight. The most interesting examples.
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Keywords: ., bookcentury1800, bookdecade1850, bookpublisherlondo, bookyear1851
