Multiple choice

A single fixed pulley is used to draw water from a well because

  1. efficiency is 100%

  2. velocity ratio is low

  3. mechanical advantage is high

  4. force is applied in a convenient direction
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

A single fixed pulley changes the direction of the applied force, making it more convenient to lift objects by pulling downward instead of upward. While it doesn't provide any mechanical advantage (force multiplier) or efficiency gain, its primary purpose is to allow force application in a more convenient direction.

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