Question

Differentiate between a single fixed pulley and a single movable pulley.

Answer 1

Hint:In order to answer this question, first we will differentiate the both single fixed pulley and a single movable pulley in several points and then we will also discuss both of them separately.

Complete answer:
Following are the differences between a single fixed pulley and a single movable pulley:-

Single Fixed Pulley	Single Movable Pulley
(1) It is fixed to a rigid support.	(1) It is not fixed to a rigid support.
(2) Its mechanical advantage is one.	(2) Its mechanical advantage is two.
(3) Its velocity ratio is one.	(3) Its velocity ratio is two.
(4) The weight of the pulley itself does not affect its mechanical advantage.	(4) The weight of the pulley itself reduces its mechanical advantage.
(5) It is used to change the direction of effort.	(5) It is used as a force multiplier.

A pulley is a metal disc with a grooved rim around which a string is wound. A single fixed pulley is defined as a pulley with its axis of rotation fixed in place. It's used to shift the effort's direction.
Whereas, a movable pulley is one that can move up and down and is connected to a ceiling or another object by two lengths of the same rope. Construction cranes, modern elevators, and several gym weight lifting machines are all examples of moving pulleys.

Note:If the weight limit of a single pulley is adequate to raise your load, use it. If the pulley isn't strong enough, proceed on to the second set of instructions, which will show you how to use a compound pulley. Connect your anchor point to the fixed pulley. In a garage, for example, this could imply connecting the fixed pulley to a chain looped around a strong ceiling joist.