What is rigidity?

Rigidity is when something doesn’t bend or move easily, it stays stiff and strong, like a wall.

Imagine you have two blocks: one is made of playdough, and the other is made of wood. If you push on the playdough block, it squishes and changes shape, that's not rigid. But if you push on the wood block, it barely moves at all, that’s rigid.

Some things are naturally rigid, like a chair or a table. They don’t wobble when you sit on them. Other things can become more rigid if they’re made stronger. For example, a rubber band is flexible, but if you stretch it and tie it tight, it becomes stiffer, almost like a string.

Rigidity helps things stay in place. If your bed wasn’t rigid, it might sag or creak when you jump on it. But if it’s really rigid, it stays firm and steady, just like a brick wall that doesn’t sway in the wind. Rigidity is when something doesn’t bend or move easily, it stays stiff and strong, like a wall.

Imagine you have two blocks: one is made of playdough, and the other is made of wood. If you push on the playdough block, it squishes and changes shape, that's not rigid. But if you push on the wood block, it barely moves at all, that’s rigid.