Why does a tower tip or buckle?
Help your child distinguish the whole tower tipping from a leg bending under compression.
Tower stability: wind, base width and bracing
A tower can tip as a whole when a sideways load overcomes its base. An individual leg can buckle under compression even while the feet stay in place. These are different failure modes that call for different improvements.
A wider base affects tipping. Shorter or better-braced compression members can help against buckling. In the lab, change base width first while keeping height and wind the same. Watch the feet and legs separately before describing what failed.
„Will the whole tower tip, will a leg bend, or will it stay standing?“
Try it together in the lab
- Begin with a prediction. You do not have to agree.
- Set Base width to 0.50 m; keep height and the wind or shaking settings unchanged.
- Ask your child to describe the feet and legs separately before naming the failure.
Next comparison: Increase height a little with the same wind or shaking, then discuss a possible improvement.
Start the labAn activity away from the screen
Build two small towers from paper tubes or blocks with the same height but different base widths. Blow gently from the side and observe whether the whole tower tips or a part bends. The simulation cannot establish the safety of a real structure.