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- DictionarySim·ple ma·chine/ˈsimpəl məˈSHēn/
noun
- 1. any of the basic mechanical devices for applying a force, such as an inclined plane, wedge, or lever.
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noun
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A simple machine is a mechanical device that changes the direction or magnitude of a force. In general, they can be defined as the simplest mechanisms that use mechanical advantage (also called leverage) to multiply force. Usually the term refers to the six classical simple machines that were defined by Renaissance scientists: Wikipedia