I think what you want is the "mechanical advantage". It's 2 .
because lifes hard
Single Pulley
single fixed pulley, single movable pulley and single fixed and movable pulley. :-)
A single movable pulley has a mechanical advantage of 2 because it reduces the effort needed to lift an object by half. This is due to the pulley system allowing the weight to be distributed between the weight being lifted and the tension in the supporting rope.
Single movable pulley
A single movable pulley is typically considered superior to a single fixed pulley because it reduces the amount of force needed to lift an object. The movable pulley changes the direction of the force applied, making it easier to lift heavy objects.
E=l/2 2=l/e or l/e=2 ma =l/e ma of single moveable pulley is : l/e=2
The mechanical advantage would be 1 because the force required to life the mass of an object becomes 1/2 the original weight of the object.
Single fixed pulley
The method to calculate mechanical advantage is easy to remember and is necessary when rigging the assembly to accomplish the job. The mechanical advantage of a rigging that will require upward pull can be determined by counting the number of rope lengths running between engaged pulleys and those doing the work. Likewise, if the assembly will require downward pull, count the ropes and subtract one to get the mechanical advantage number. The subtraction is necessary because with the fixed pulley, the downward pull equals the load on the other length of rope so the last "pull" rope does not provide any mechanical advantage.
A single fixed pulley (:
A fixed pulley is stationary and changes the direction of force, while a movable pulley moves with the load and provides a mechanical advantage by distributing the force over multiple ropes. Fixed pulleys have a single attachment point, while movable pulleys have two attachment points—one fixed and one moving.