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.

Related Topics:
Simple machine - 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).

Related Topics:
Human - Monkey - Animal - Primate - Bird - Raven - Sea otter - Anthropologists - Evolution of mankind - Opposable thumb

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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.

Related Topics:
Weapons - Hammer - Knife - Explosive

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