Can opener and parachute: what they have in common

1. Step 1. Can opener — uses — Wedge. The blade slits the tinplate.
2. Step 2. Wedge — is used in — Harpoon. A barbed point enters like a wedge and does not come back out.
3. Step 3. Harpoon — has part — Rope. A line connects the head to the hunter.
4. Step 4. Rope — is part of — Parachute. The lines are ropes.

Open Evothings