Teddy bear and smartphone: what they have in common

1. Step 1. Teddy bear — is made of — Wool. Plush.
2. Step 2. Wool — is material for — Billiards. The baize.
3. Step 3. Billiards — uses — Newton’s laws. Collisions of balls.
4. Step 4. Newton’s laws — is used in — Accelerometer. The sensor measures the force of inertia.
5. Step 5. Accelerometer — is part of — Smartphone. The accelerometer rotates the screen.

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