Pulley

**What is a pulley?** A pulley is a simple machine that helps to lift objects. A pulley is a wheel with a rope moving around it. The wheel has a groove. The rope fits in the groove. One end of the rope is attached to a wheel. While the other end of the rope is pulled, the wheel move and the object is easy to lift.

**Some examples of a pulley:** flagpole, sailboat mast, window blinds

**Check out this video clip to see how this simple machine makes work easier.** **http://www.schooltube.com/video/cdf9de2fbe3047f494dd/Pulley-Madness**