Simple Machines - class-X

Load $L$ is attached to the movable pulley. A rope is fixed at a point in ceiling that passes through the movable pulley.
In order to lift the load $L$ by $X$ meters, the effort $E$ needs to travel the distance of 2X meters. (The entire rope needs to be pulled by $E$ for a distance of 2X.)
Now, Velocity Ratio equals (Distance traveled by $E$) divided by (Distance traveled by $L$)
So it becomes : $2X/X$. This equals to 2
Since it is a ratio. it has no units of measurement.

Both crane and flagpole comprises of pulley but not well. 

A fixed pulley is primarily used to change the direction of the applied force, making it easier to pull a load downwards rather than lifting it upwards.

A single fixed pulley acts like a first-class lever where the axle is the fulcrum, the load is on one side, and the effort is on the other side.

In a single fixed pulley, the effort required is equal to the load (ignoring friction), as the mechanical advantage is 1.

A pulley consists of a wheel (sheave) that rotates freely on an axle, allowing the rope to move over it with minimal friction.

A single fixed pulley is a machine that only changes the direction of the force applied, not the amount.
The wheel of a fixed pulley does not move because the wheel is attached to some support.

A single fixed pulley functions as a first-class lever where the axle acts as the fulcrum, the load is on one side, and the effort is on the other.

A sing;e fixed pulley like the one having an ideal mechanical advantage of 1 since the effort force is equal to the load force.

A pulley is designed with a wheel that rotates freely on its axle to allow a rope or cable to pass over it smoothly.

A pulley is the standard simple machine used to lift water from a well because it allows the user to pull downwards to lift the bucket upwards.

$\displaystyle VR=\frac { Distance\quad moved\quad by\quad effort }{ Distance\quad moved\quad by\quad load } $
$\displaystyle MA=\frac { 2Effort }{ Effort } =2$
When effort mved a distance x load moved a distance = x/2
So, 
$\displaystyle VR=\frac { X }{ X12 } =\frac { 2X }{ X } =2$

Using a single movable pulley, the load can be lifted by applying an effort equal to half the load i.e. single movable pulley acts as a force multiplier.

Single fixed pulley is fixed to a rigid support whereas a single movable pulley is not fixed to a rigid support.

Weight of pulley does not affect mechanical advantage of single fixed pulley.

In single movable pulley, ideal mechanical advantage is 2. Its velocity ratio is 2. It is used as a force multiplier. Load moves in the direction of effort.

A movable pulley is a pulley allowed to have translational motion.

A single fixed pulley has an ideal mechanical advantage of 1 since the effort force is equal to the load force.
No, it cannot be used as a force multiplier, instead, it is used to change the direction of force applied.

We know that for a single fixed pulley, Distance moved by effort is equal to the distance moved by load.
$ Distance; moved ;by; effort = x$
$\therefore Distance ;moved ;by ;load = x$

$Velocity\ Ratio = 3$

In a single fixed pulley, the effort applied equals the load being lifted, as the mechanical advantage is 1.

$Mechanical advantage = Velocity Ratio \times Efficiency $
$M.A = 3 \times \dfrac{60}{100} = 1.8$
$M.A = \dfrac{load}{effort} $
$\therefore load = M.A \times effort$
$\Rightarrow 1.8 \times 200 = 360kgf$

A fixed pulley does not reduce the weight or add force; it simply changes the direction of the force, allowing the user to use their body weight to pull down instead of lifting up.

A single fixed pulley does not provide a mechanical advantage greater than one, nor does it reduce the weight of the load. Its primary purpose and advantage in this context is changing the direction of the applied force, making it more convenient to pull downward.