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Simple Machines
Machines use our physics discoveries to make work easy for us! Work has two parts - the force applied and the distance it is applied over. By making us apply a small force over a large distance a machine can make required less effort (the force we put in). We always put in more work than we get out of a machine - no machine is 100% efficient but you would never know that when you see how easy they make a job!
Below we have a You Tube recording of Bill Nye the Science Guy's take on machines - watch and enjoy!
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Cyberphysics - a web-based teaching aid - for students of physics, their teachers and parents....
