The German mechanician Franz Reuleaux 21 wrote, "a machine is a combination of resistant bodies so arranged that by their means the mechanical forces of nature can be compelled to do work accompanied by certain determinate motion." Notice that forces and motion combine to define.Structural components edit A number of machine elements provide important structural functions such as the frame, bearings, splines, spring and seals.A jet engine uses a turbine to compress air which is burned with fuel so that it expands through a nozzle to provide thrust to an aircraft, and so is also an "internal combustion engine." 23 Power plant: The heat from coal and natural gas.

Further reading edit Oberg, Erik; Franklin.History edit The hand axe, made by chipping flint to form a wedge, in the hands of a human transforms force and movement of the tool into a transverse splitting forces and movement of the workpiece.The rigid-body dynamics studies the movement of systems of interconnected bodies under the action of external forces.

Springs provides forces that can either hold components of a machine in place or acts as a suspension to support part of a machine.Contents, etymology edit The English word machine comes through Middle French from Latin machina, 2 which in turn derives from the Greek ( Doric makhana, Ionic mekhane "contrivance, machine, engine 3 a derivation from mekhos "means, expedient, remedy" 4 ).