Eli5: when two objects colide what decides which breaks?

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Like if I threw an egg at a wall the egg would break, but if the egg is going really fast the wall would break too? Whats the underlying mechanic for this?

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Anonymous 0 Comments

Given that in an impact both objects experience the same force, what decides which object breaks is the hardness of the material. Softer materials, ergo, the egg, will break when hitting stronger surfaces. Obviously, the force of impact adds to it, but very little.

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