[Illustration: FIG. 98.--A slightly different form of lever.]
Suspend a stick with a hole at its center as in Figure 98, and hang a
4-pound weight at a distance of 1 foot from the fulcrum, supporting
the load by means of a spring balance 2 feet from the fulcrum. The
pointer on the spring balance shows that the force required to balance
the 4-pound load is but 2 pounds.
The force is 2 feet from the fulcrum, and the weight (4) is 1 foot
from the fulcrum, so that
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