Multiple choice

Why is it easy to draw water from a well when the rope passes over a pulley, rather then drawing it directly?

  1. Pulley adds more water

  2. Pulley decreases the weight of the bucket

  3. Pulley has a mechanical advantage of more than one

  4. Pulley changes the direction of force

  5. Pulley increases the effort
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Yes, pulley changes the direction of the pull on the rope from upwards against gravity to downwards towards gravity. This makes easier to lift heavy bucket. No, pulley does not increases the effort but it decreases it.

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