like in a fixed pulley the load is tied to the string and it comes up.but how does it com in movable pulley?does the pulley itself comes up?
In a movable pulley, yes the pulley comes up.
It works like this. Suppose you have a 50 lb weight on the floor and you want to lift it up. You attach a rope to the ceiling and thread it thru the pulley and hold the end in your hand. You
A example of a simple pulley system and how it works.
How Elevators and Pulleys Work
No wonder they got American economy in so much trouble
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