Torsion fiber and lathe: what they have in common

1. Step 1. Torsion fiber — is part of — Torsion balance. A thin fibre that twists under force.
2. Step 2. Torsion balance — uses — Elasticity. The twisting of a fibre.
3. Step 3. Elasticity — is used in — Bow and arrow. A bow stores the energy of elastic deformation and releases it into the arrow.
4. Step 4. Bow and arrow — has part — Rope. The bowstring is a cord of sinew or fibre.
5. Step 5. Rope — is part of — Lathe. The bowstring wraps around the workpiece and turns it.

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