Yo-yo and hydraulic press: what they have in common

1. Step 1. Yo-yo — uses — Angular momentum. Rotation.
2. Step 2. Angular momentum — is used in — Rifling. Spin stabilizes the bullet.
3. Step 3. Rifling — is part of — Tank gun. Rifled tank guns (today often smoothbore).
4. Step 4. Tank gun — has part — Recoil mechanism. Recoil mechanisms.
5. Step 5. Recoil mechanism — uses — Hydraulics (Pascal’s law). A hydraulic recoil brake.
6. Step 6. Hydraulics (Pascal’s law) — is used in — Hydraulic press. Pascal’s law multiplies the force.

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