using several pulleys together instead of a single pulley using a fixed pulley instead of a moveable pulley pulling a long rope instead of a short rope pulling a rope up instead of down
I gave my students this multiple choice question: Which action involving a pulley system requires the least amount of force?

Only one answer is correct among these 4 choices:
- using several pulleys together instead of a single pulley
- using a fixed pulley instead of a moveable pulley
- pulling a long rope instead of a short rope
- pulling a rope up instead of down

Could you tell me which one is correct?

using several pulleys together instead of a single pulley