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 ...

But could a pulley system help these children pull a 12 tonne truck?' PRESENTER:A pulley is just a wheel, like this. PRESENTER:But it's a wheel that has a groove running all the way around it.