Simple Machines. By:. A rope, a wheel with a groove in it and a weight make up a pulley. You can pull down on the rope to lift the weight. A wedge is a simple machine that can be used to split things apart or hold a door open. Pulley and Wedge.
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A wedge is a simple machine that can be used to split things apart or hold a door open.Pulley and Wedge
A heavy object can be rolled up an inclined plane, instead of lifting it straight up. Using this simple machine can save effort, although the object must usually cover more distance if this simple machine is used.Wheel and Axle and Inclined Plane
Examples: Door on Hinges, Seesaw, Hammer, Bottle Opener
This simple machine can be used to hold things together. It is made up of an inclined plane wrapped around a cylinder.Lever and Screw
R. Moyer, L. Daniel, J. Hackett, H.P. Baptiste, P. Stryker, J. Vasquez, McGraw-Hill Science Virginia Edition (National Geographic Society) Macmillan/McGraw-Hill, New York, 2004