In [Fig. 45], the distance from the fulcrum to the power is ten times the distance from the fulcrum to the weight; now, if the small body weighs one pound, how much must the large body weigh, so as to balance it?
The large body must weigh ten pounds.
When the small body weighs ten pounds, how much must the large body weigh, so as to balance it?
The large body must weigh ten times as much, or one hundred pounds.
If the smaller body be moved half-way to the fulcrum, how much weight will then balance it?
It will then take only half the weight, or fifty pounds to balance it.
What other familiar example of this kind of lever may be mentioned?
The pump-handle is a lever of this kind.
Fig. 46.