The origin of simple machines is indefinite. Ancient people might have used the idea of a pulley when they lifted heavy objects by throwing crude ropes or vines over tree branches, or the first levers were probably logs used to move heavy objects. Notwithstanding their antiquities, simple machines are significant sources of ease and comfort for all people living until today’s generation.
Millions of people ride a bike or motorcycle everyday and almost everyone uses a switch to turn on the lights or need a simple handle to open a door. Generally, people use levers, pulleys, inclined planes, ...
