Rocking horse rockers e oil well: o que têm em comum

1. Passo 1. Rocking horse rockers — faz parte de — Rocking horse. Curved supports for rocking.
2. Passo 2. Rocking horse — utiliza — Pendulum. Rocking.
3. Passo 3. Pendulum — utiliza — Newton’s laws. The swing is described by Newtonian mechanics.
4. Passo 4. Newton’s laws — é utilizado em — Truss. A triangle is a rigid shape.
5. Passo 5. Truss — é feito de — Wrought iron. Then — wrought iron.
6. Passo 6. Wrought iron — é material para — Oil well. The casing pipes are iron.

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