In this video, we uncover the fascinating world of mechanical advantage through three simple yet powerful machines , levers, pulleys, and gears. For centuries, humans have used these inventions to ...

Discover how pulleys make lifting easier by spreading out force and changing direction. This science extra explores simple machines in action breaking down how pulleys work and where we use them every ...

For example, you can see how many pulleys you need to lift a spaceship or see how the direction of a machine changes depending on how much force is applied. Simple Machines is available for $2.99 ...

Simple machines are devices such as levers, screws and pulleys. They are all designed to help us. Simple machines use a smaller force to have a greater effect and change motion.