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If the pulley is frictionless the angle does not matter, the tension in the rope will be the same on both sides of the pulley.
If there is friction in the pulley however then you want to reduce the friction as much as possible. You do that by creating as large an angle between the two ropes as possible.
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What would happen to a pulley system if the load were increased?
Ideal mechanical advantage is the mechanical advantage when there is no friction. It is the mechanical advantage when the efficiency of the pullefy system is 100%. It is a constant for that system of pulleys. Therfore it is not affected by increasing or decreasing the load. But actual mechanical advantage will be less than this ideal mechanical advantage due to friction. In other words the efficiency will be less than 100 %. If the efficiency is 80%, it implies 20% is wasted due to friction while lifting a load. If we increase the load the friction also increases and hence the efficiency will decrease with the load.
What pulley system creates just directional advantage?
Single fixed pulley
Who invented the pulley system?
Archimedes
What is lever system rahat in irrigation?
pulley
Examples of a pulley and belt system?
A car engine
