Quotation from: General Science

Written by: Bertha M. Clark


The steeper the incline, the more force necessary to raise a weight;
whereas if the incline is small, the necessary lifting force is
greatly reduced. On an inclined plane whose length is ten times its
height, the lifting force is reduced to one tenth the weight of the
load. The advantage of an incline depends upon the relative length and
height, or is equal to the ratio of the length to the height.


156. Application. By the use of an inclined plank a strong man can
load the 600-pound bowlder on a wagon. Suppose the floor of the wagon
is 2 feet above the ground, then if a 6-foot plank is used, 200 pounds
of force will suffice to raise the bowlder; but the man will have to
push with this force against the bowlder while it moves over the
entire length of the plank.

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