A fixed wheel changes direction of your pull — but NOT the amount. Pull 9 times to feel all 500 kg!
🙂
Pull the rope. The wheel only redirects your force — the crate is still 500 kg.
A heavy stack on the other end carries most of the car's weight. Find the stack size that makes the motor's worst day lightest.
1100 kg stack
People in car3 × 100 kg
Motor must lift (difference)0 kg
Worst case (max load)600 kg
🤔
Slide to add/remove people. Find the stack where the red "worst case" number is smallest.
Car goes up ↔ Stack goes down at same speed. Add passengers, call a floor, then steal the stack!
Car + passengers600 kg
Counterweight840 kg
Motor effort0 kg
🛠️
The yellow stack carries most of the load. The motor barely works!
Power off → brake clamps shut by spring. Rope snap → governor catches car. Both work with zero electricity!
⚡ Electricity — holds brake open
Falling speed0 m/s
Governorcalm
🫨
Kill the power while running — the brake shuts by itself. Then snap the rope and watch the governor!
Quick Quiz — answer 3 to earn ★
Deliver 4 passengers with the fewest floors traveled. Real controllers solve this in 20 ms!
Floors traveled0
Best possible?
Delivered0 / 4
🧠
Tap floors in order. Try one sweep up, then down!
Nothing saved. Refresh = fresh lab.