Simple Machines in Machines

Question: What machines have more than one simple machine in them? Answer: A machine is a structure that consists of a framework and a number of parts that are fixed or can move to do work. A machine can be as straightforward as a screw or as complex as a bus. Machines often use one or more simple machines (wedge, screw, inclined plane, wheel and axle, lever, pulley) that work together to do a job. Here are a few examples of everyday machines that contain several simple machines. A manual can-opener: The handle you turn to make the can rotate is a wheel and axle. The two long arms that clamp the can securely make a lever. The circular wheel that cuts the can lid is sharpened to make a wedge. A corkscrew: The handle at the top that you turn is a wheel and axle. The spiral metal piece that screws into the cork is a screw. The two side arms that are pushed down are two levers.(not all corkscrews have these handles) A clamp: The rod that you turn to tighten the clamp is a wheel and axle. The threaded rod that moves to hold the item securely is a screw. A pair of scissors: The two arms that you squeeze together are levers. The cutting edges of the scissor blades are sharpened to be wedges. A bicycle: The handle bars and pedal are wheel and axle mechanisms. The hand brakes contain levers.                          Some machines with simple machines in them.           Can-opener                    Clamp                             Corkscrew

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