pulleys ansel

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Post on 30-May-2015

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  • 1. By , Ansel Olsen

2. A pulley is a wheel & a rope. Pulleys make lifting objects easier. 3. Pulleys may have been invented byArchimedes. It was invented more than 2,500 years ago.Pulleys are used to make objects go up by pulling down. Pulleys were partially made to make workeasier. 4. Bike pulleys Chain pulleys Water pulleys Motor pulleys Elevator pulleys Food pulleys Flagpole pulleys Toilet paper pulleys