Question

What is a pulley? Explain single fixed pulley, block and tackle pulley and single movable pulley with the help of diagrams.

Accepted Answer

A pulley is often a wheel with a groove and a rope attached to the groove. The wheel can be any size, and the rope lengths can be various as well. A wheel can also be referred to as a drum or a sheave. A compound pulley is a combination of a movable and a simple pulley. A combination pulley is another name for it.

A single fixed pulley is one type of pulley. The wheel is fastened to a solid and rigid framework in this pulley, while the rope is let loose. It will almost never allow force to be redirected. As a result, rather than lifting an object, this pulley may easily pull it. The image for a single fixed pulley is as given below:

The wheel of this pulley is not attached to any surface, yet the rope is attached to a stationary surface. When a heavy load is attached to the wheel rather than the rope, the wheel may be seen sliding up the rope with the load when the rope is pushed. When opposed to raising the load directly, this requires less effort. The mechanical advantage is two in this case. The figure of a single movable pulley is as shown below:

A block and tackle pulley can let you lift a big object with little effort. It can reduce the amount of effort necessary to move a dense mass object. It has many movable and fixed pulleys arranged in parallel with one another, with fixed pulleys next to fixed pulleys and moveable pulleys next to movable pulleys. All individual pairs have a connection to any other pair. The figure is as given below:

What is a pulley? Explain single fixed pulley, block and tackle pulley and single movable pulley with the help of diagrams.

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