Explains how pulleys work to lift heavy weights more easily. A fixed pulley changes the direction of force, allowing for easier lifting, while a movable pulley reduces the amount of force needed to ...

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 ...

When this was made it allowed 10 unskilled men to do the work of 110 craftsmen. The navy used 100,000 blocks annually.This is a block making machine, designed by Marc Isambard Brunel to make wooden ...