A tool is something that is used in order to gain a mechanical advantage and increase power transfer. Some simple examples are hammers, screwdrivers, and knives. An ergonomic tool will give a biomechanical advantage. Such a tool should reduce the amount of force required and improve the quality of work that is done. Man has been using tools right from the time he was a hunter and a gatherer of food to gain a mechanical advantage. Since then he has also been able to make tremendous improvements and design better tools that fulfill his needs better and make him more efficient.
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