The simplest explanation of lever is a kind of a manual machine with a bar which makes the lifting or raising of heavy things quite easy. In order to make things balance or equal, a lever is used. A weighing balance is a kind of a lever. Lever is a kind of a tool and has been used for thousands of years. Primitive man is supposed to have invented the lever, in order to transport, lift, raise or weigh heavy things such as rocks and stones. Lever is also defined as anything that helps make move a certain object by applying a minor force with the help of some other object is called lever.
