This is a picture of a pulley. A pulley is a wheel with a rope, wire, or chain around it. One thing a pulley does is change the direction of force.https://www.google.com/search?q=wheel+and+axle+gif&biw=1273&bih=709&source=lnms&tbm=isch&sa=X&ei=6SVEVer6AoOrggSf0IDQAQ&sqi=2&ved=0CAYQ_AUoAQ&dpr=1#imgrc=NdZrQW8ixrL2BM%253A%3BA1sO04NmFIibZM%3Bhttp%253A%252F%252Fed101.bu.edu%252FStudentDoc%252FArchives%252FED101sp10%252Frawdons%252Fimages%252FOC0811004_L6WheelAndAxle2.gif%3Bhttp%253A%252F%252Fprezi.com%252Fkursfgkh5rql%252Fwheel-and-axle-new%252F%3B350%3B350
There are a few different types of machines. A few examples of machines would be the lever, the pulley, the inclined plane, the wheel and axle, and the pulley. This is a picture of a wheel and axle. The wheel and axle is a special kind of lever that moves or turns objects. One example of a wheel and axle would be a screw driver.
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