2.1M
PHEveryone sees 500 kg…
Only physics sees how little force is actually needed 🪜⚙️
How much force F is required to lift this 500 kg load?
This system uses multiple pulleys, not strength.
Key physics behind it:
• Each movable pulley shares the load
• More rope segments = more mechanical advantage
• Tension is the same throughout an ideal rope
Here the load is split step-by-step:
500 kg → 250 kg → 125 kg → 62.5 kg
That’s why each person applies far less force than the total weight.
This isn’t magic.
It’s classical mechanics doing its job.
Simple machines don’t reduce work —
they reduce the force required.
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