Pulley systems are simple machines that make lifting heavy objects easier. They consist of a rope or cable that passes over one or more wheels (pulleys). A single pulley changes the direction of force ...

Mechanical devices can change one form of force to another. All moving parts work on some sort of mechanism. Mechanical systems all involve an input, process and produce an output. There are three ...

Besides sending lots of smile-inducing horsepower to your rear tires, the crank also powers all the engine accessories necessary to keep your Chevy rolling down the highway. To do this, power is ...