Question

What is a single fixed pulley? State its one use.

Answer 1

Hint:Before going through the question we should first discuss simple machines. Any of many machines with little or no moving parts that are used to modify motion and the magnitude of a force in order to conduct work are referred to as a simple machine. They are the most basic mechanisms for increasing force by leverage (or mechanical advantage). The inclined plane, lever, wedge, wheel and axle, pulley, and screw are examples of simple machines.

Complete answer:
Pulley: It's a simple wooden or metal machine that lifts heavy loads with a wheel and rope. To bear small loads, plastic pulleys are now available on the market. This can be freely rotated around an axis that runs through its middle. It has the ability to adjust the direction of a power, making it much easier for people to lift heavy objects.

Pulley Types:
Fixed pulley: The block of the pulley is known as fixed when it is fixed on a high platform. An extensible string passes through the groove, one end of which is bound to the body to be raised and the other end of which is free.

Movable pulley: It's called movable when the pulley's block isn't set but still holds the load. An inextensible string is tied around the groove, with one end secured to a fixed support and the other free to exert effort. The block, along with the load, moves upward as the effort is applied.

compound pulley: A compound pulley is made up of two types of pulleys: simple and moveable. It's also known as a combination pulley. It's made to make the effort equal to or less than half the weight of the load. It's a common occurrence on construction sites where cranes are used to lift large steel and concrete pieces.

Now here in the given question we are asked about a single fixed pulley so we will now have some more detailed ideas on it. The simplest pulley is a single fixed pulley, which has only one wheel that is fixed in place. A single fixed pulley does not provide mechanical advantage; instead, a suspended pulley is required to achieve mechanical advantage.

A single fixed pulley is only used to adjust the direction of the force applied, allowing the effort to be applied in a more convenient manner. A fixed pulley aids in the direction change of the applied force. When you pull down on a fixed pulley, you can add to the movement by using your own body weight. When you lift something, on the other hand, you must also lift the weight of your own arms.

Use: A single fixed pulley is used to lift a small load from the well, such as a water bucket.

Note:A question may arise that, What effect does the diameter of the pulley have on efficiency? A larger diameter pulley wheel (also known as a sheave) is more effective in terms of efficiency. However, there is a downside: a larger pulley adds size, weight, and cost.