Quotation from: General Science

Written by: Bertha M. Clark


If we employ a stationary pulley, as in Figure 109, we do not change
the force, because the force required to balance the load is as large
as the load itself. The only advantage is that a force in one
direction may be used to produce motion in another direction. Such a
pulley is known as a fixed pulley.


[Illustration: FIG. 109.--By means of a pulley, a force in one
direction produces motion in the opposite direction.]

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