Particle accelerator and rope: what they have in common

1. Step 1. Particle accelerator — evolved from — Van de Graaff generator. Early accelerators.
2. Step 2. Van de Graaff generator — evolved from — Electrostatic machine. A belt generator.
3. Step 3. Electrostatic machine — uses — Friction. Friction.
4. Step 4. Friction — is used in — Rope. Twisted fibres hold each other by friction.

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