Question

What does pulley mean and explain its working.

Answer 1

Hint:A pulley is a basic wooden or metal mechanism that lifts large weights with the use of a wheel and rope. To handle modest weights, plastic pulleys are now available on the market. This may be freely rotated along an axis that runs through its centre. It has the ability to alter the direction of a force, making it considerably easier for humans to move heavy objects. You can use this to hoist a ten-kilogram, one-meter-high item by pulling down on one end.

Complete step-by-step solution:
Simple machines are made up of six primary components: pulleys, levers, screws, wheels (also known as axles), inclined planes, and wedges. The planes that are inclined Wedge and screws belong to the inclined plane, but pulleys, also known as wheels, are a sort of lever. All of the pulleys are discussed here. This has a grooved rim and is wheel-shaped. Its primary purpose is to reduce force. We must put effort on the rope's downside if we wish to lift a large load. As a result, it is much easier to transfer a weight down rather than up with the aid of a rope, which requires more force than the previous situation. In all of these operations, a moveable pulley is linked to the load in order to minimise the amount of force necessary to complete the task. The pulley combination is used to change the amount of needed force as well as the work direction. As a result, it is beneficial for moving, pushing, and lifting loads, as well as making our hard task more manageable. To hoist the weight, we pull the rope down. You must pull down with a force equivalent to 100 kg, which is 1000N, to raise something weighing 100 kg (newtons). You must pull the free end of the rope a total distance of 1 m at the other end if you wish to hoist the weight 1 metre into the air.

Note:The block of the pulley is termed as fixed when it is mounted on a high platform. An extendable string goes through the groove, one end of which is attached to the body to be hoisted and the other end of which is free.
It's called movable when the pulley's block isn't fixed but nevertheless carries the weight. An inextensible string is wrapped around the groove, with one end secured to a fixed support and the other free to exert effort. The block, together with the load, travels higher as the effort is exerted.