Question

what is the mechanical advantage of a single fixed pulley ?

Answer 1

It is easy to operate

Answer 2

A single fixed pulley, like the one in Figure 1(a), has an ideal mechanical advantage of 1 since the effort force (120 N) is equal to the load force (120 N). However, in the single movable pulley (Figure 1(b)), half of the load is supported by the rope attached to the ceiling.