Bicycle and watt steam engine: what they have in common

1. Step 1. Bicycle — works like — Exercise bike. The “Gymnasticon” pedal machine (1796) is older than the bicycle; later exercise bikes adopted the bicycle layout.
2. Step 2. Exercise bike — has part — Flywheel. A flywheel.
3. Step 3. Flywheel — is part of — Watt steam engine. The flywheel evens out rotation.

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