Which of the following actions will improve the efficiency of the pulley system?

Physics WAEC 2002

Which of the following actions will improve the efficiency of the pulley system?

  • reducing the mass of the pulley checkmark
  • increasing the friction force between the string and the pulley
  • increasing the mass per unit length of the string of the pulley
  • increasing the mass of the pulley

The correct answer is: A

Explanation

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