Chains for swinging and monitor: what they have in common

1. Step 1. Chains for swinging — is part of — Battering ram. Chains or ropes for swinging.
2. Step 2. Battering ram — uses — Newton’s laws. The momentum of a heavy log.
3. Step 3. Newton’s laws — is used in — Accelerometer. The sensor measures the force of inertia.
4. Step 4. Accelerometer — is part of — Smartphone. The accelerometer rotates the screen.
5. Step 5. Smartphone — has part — Display. The screen is the main means of input and output.
6. Step 6. Display — is part of — Monitor. The heart of a monitor is the display: an LCD panel, once a picture tube.

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