The pulley is like a wheel with a string going on one side going up and around then down the other side. When you pull one side it lifts the load that is on the other side rises and when you let go the load dropps. PEACE OUT! ={)
Yes, there is no difference
It will be one of the smooth ones with no ribs.
it's an alone pulley mostly found bulted to engine block. the belt can run under or over it
its not to push or pull an object its a simple machine made from a grooved wheel with a rope or cable wrapped around the groove.
Window blinds, flagpoles, cars.