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 ...

This Roman wooden pulley system was found at Bar Hill Roman Fort ... Therefore, it is believed that this simple pulley block was a component of lifting machines, which would have helped the ...

while a movable pulley reduces the amount of force needed to lift a weight. By using multiple pulleys in a system known as a block and tackle, the force required to lift a weight can be ...