# Lever and Fulcrum

## Description

Illustration of a lever with fulcrum F. W represents the weight lifted, P is the force that does the lifting, D is the distance from the fulcrum to the point of application of the force, and d is the distance from the fulcrum to the point where the weight is attached. In all possible relations of the fulcrum, weight, and force the following proportion holds: P:W = d:D.

## Keywords

force, fulcrum, lever, levers, proportion problems, proportions, ratio, ratios

## Galleries

## Source:

Claude Irwin Palmer *Practical Mathematics for Home Study* (New York, NY: McGraw-Hill Book Company, Inc., 1919)

Courtesy the private collection of Roy Winkelman