SCIENCE PHOTO LIBRARY SCIENCE PHOTO LIBRARY
Weight on beam. Historical artwork of a weight hooked onto a beam. This is a cantilever beam as it is fixed (in a wall) at one end, but is free at the other. The diagram illustrates the beam's breaking strength. The branch of physics concerned with the study of forces on bodies and the motions that result is called mechanics. This artwork is from the book Two New Sciences of 1638 by the Italian scientist Galileo Galilei (1564-1642).
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