Tool

A tool is a device that provides a mechanical or mental advantage in accomplishing a task.

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Most tools employ some form of simple machine, or a combination of them. For example, a crowbar simply functions as a lever. The further out from the pivot point, the more force is transmitted along the lever.

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Philosophers once thought that only humans used tools, and often defined humans as tool-using animals. But observation has confirmed that monkeys and other animals, mostly primates, but also some birds (ravens, for instance), and sea otters can use tools as well. However, humans are the only "animals" that have the ability to make tools from raw materials. Most anthropologists believe that the use of tools was an important step in the evolution of mankind. Humans evolved an opposable thumb (useful to hold the tools) and an increase in intelligence (aiding in the use of tools).

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Most tools can also serve as weapons, such as the hammer and the knife. Similarly, people can use weapons, such as explosives, as tools.

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Simple machine: In physics, a simple machine is any device that only requires the application of a single force to work....

Lever: In physics, a lever...

Monkey: A monkey is any member of two of the three groupings of simian primates. These two groupings are the New World and Old World monkeys of which together there are nearly 200 species. Because of their similarity to monkeys, apes such as chimpanzees and gibbons are sometimes incorrectly called monkeys. ...

Tool related Images and Photos (experimental)

Tool	Tool	Tool - Gray Tool Man	Tool - Spectre Spiral
Hoodie: Tool - Never Ending	Tool Logic Ice Lite II	Tool Logic LED Tech Light	Tool Logic Office Assistant
Take-Along Tool Kit	Disney Cars Tool Box Book	Zilla Multi-tool	Workstation Repair Tool Kit