E=l/2
2=l/e or l/e=2
ma =l/e
ma of single moveable pulley is : l/e=2
because lifes hard
I think what you want is the "mechanical advantage". It's 2 .
Single Pulley
A moveable pulley reduces the amount of force needed to lift an object by distributing the load between two sections of the rope. This type of pulley system also allows for the direction of the lifting force to be changed, making it easier to lift heavy objects vertically.
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.
we find mechanical advantage of pulley by using principle of lever. according to this moment of effort is equal to moment of moment of load. As in this case effort arm is equal to load arm. so mechanical advantage is equal to one. but we know we can never finish friction between rope used and pulley so mechanical advantage is less than one
A single fixed pulley (:
Single fixed pulley
single fixed pulley, single movable pulley and single fixed and movable pulley. :-)
The mechanical advantage of a single fixed pulley is 1. This means that the input force is equal to the output force, making the pulley useful for changing the direction of the force applied.
Depending on how the pulley is mounted and how the rope is strung, the M.A. of a set-up with a single pulley is either ' 1 ' or ' 2 '.
A single pulley has no mechanical advantage, it just changes direction.