A single movable pulley is used to lift a load of 800N.What is the effort required?
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5
Answer:250N
Explanation:
Mechanical advantage(MA) =Load/Effort
=Effort=500/2N=250N
Answered by
4
The movable pulley reduces the effort required to pull a mass by factor of 2 × number of movable pulleys. Consider a simple example of single fixed and movable pulley. In case I of fixed pulley the effort will be same as of load being lifted as tension in rope will be same across pulley, hence mechanical advantage will be 1.
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