A single fixed pulley on top of a flagpole is used to raise a flag. What advantage does this fixed pulley…

A single fixed pulley on top of a flagpole is used to raise a flag. What advantage does this fixed pulley provide to the person pulling the rope?
  1. It reduces the effort force required to lift the flag by half.
  2. It changes the direction of the applied force, making it easier to pull downwards.
  3. It eliminates friction completely between the rope and the pole.
  4. It increases the weight of the flag to keep it steady.

Solution

A single fixed pulley does not reduce the required effort force; it only changes the direction of force so gravity can assist the person pulling downwards.

Asked in: Homi Bhabha Practice

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