Leather seat and turbine: what they have in common

1. Step 1. Leather seat — is part of — Saddle. A leather seat.
2. Step 2. Saddle — is part of — Bicycle. The bicycle saddle took its name from the horse saddle.
3. Step 3. Bicycle — has part — Bicycle drivetrain. The drivetrain transfers the force of the legs to the rear wheel — the main difference from a kick scooter.
4. Step 4. Bicycle drivetrain — has part — Freewheel. A freewheel.
5. Step 5. Freewheel — uses — Torque. It transmits torque in one direction only.
6. Step 6. Torque — is used in — Turbine. The flow creates torque.

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