Elasticity (physics)

Elasticity is how stretchy or bendy something is. When you push or pull on something, it can either stretch out or go back to its original shape.

Think of a rubber band. When you stretch it, it gets longer and thinner. But when you let go, it snaps back to its original size. This is because of elasticity.

Everything in the world has some level of elasticity. Some things are very stretchy, like rubber bands or balloons, and others are not stretchy at all, like a brick.

Scientists use a special formula called "Hooke's Law" to measure how elastic something is. This formula helps them figure out how much force it takes to stretch or bend the thing, and how much it will go back to its original shape when the force is removed.

So basically, elasticity is all about how much something can stretch or bend and how well it goes back to its original shape afterwards.