Pulleys are used to help lift many things. Lifts, window blinds and cranes often use pulley systems. Let’s change gear to look at gears. Gears are also wheels attached to a fixed axle ...

The solution? A pulley system to make everything easier. The concept is simple. [Barnso]’s system uses three pulleys. The headphone cable goes to the PC, and then runs over the first pulley.

Using a pulley system meant we needed a longer piece of rope in order to raise the weight, but at the same time pulleys reduce resistance. Using a two-pulley system, we had to pull the rope twice ...

When she needs to water her plants she can simply use the pulley system to bring the plants down. We can see this working ...