Ferry and lathe: what they have in common

1. Step 1. Ferry — uses — Archimedes’ principle. It stays afloat by Archimedes’ principle.
2. Step 2. Archimedes’ principle — is used in — Offshore drilling platform. Floating platforms.
3. Step 3. Offshore drilling platform — has part — Drilling rig. A drilling rig.
4. Step 4. Drilling rig — has part — Block and tackle. The block and tackle lifts the drill string.
5. Step 5. Block and tackle — has part — Rope. The rope runs around the pulleys.
6. Step 6. Rope — is part of — Lathe. The bowstring wraps around the workpiece and turns it.

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