A single pulley has no mechanical advantage, it just changes direction.
In order to answer that, I'd have to see the drawing of the pulley
that's right next to the question in the book you copied it from.
1
The simple pulley is the type of pulley that does not have a mechanical advantage.
The mechanical advantage of a pulley system is the ratio of the output force to the input force. It is calculated by dividing the load force by the effort force required to lift the load. The mechanical advantage of a pulley system can be greater than 1, making it easier to lift heavy objects.
Pulleys allow for the transfer of force and motion over a distance. They can help to lift heavy objects with less effort by distributing the weight to multiple ropes or chains. Pulleys also enable redirection of force, making it easier to change the direction of an object's movement.
The mechanical advantage of the pulley system is the inertia and friction of the unbalanced and balanced forces acting on the mechanical advantage which is part of the pulley system....
A fixed pulley has a mechanical advantage of 1, meaning it doesn't provide any mechanical advantage, but it changes the direction of the force. A free pulley also has a mechanical advantage of 1, as it only changes the direction of the force without providing any mechanical advantage.
A single fixed pulley (:
A simple pulley is one fulcrum with no mechanical advantage.
Mechanical advantage of a fixed pulley
A fixed pulley has a mechanical advantage of 1, which means it doesn't provide any mechanical advantage in terms of force. It changes the direction of the force applied without multiplying it.
The mechanical advantage of a pulley can be greater than 1.The efficiency cannot but that is a different matter.
A forklift generally gets it mechanical advantage from hydraulic rams, not pulley systems...