A glass falls and breaks. Why?
What causes things to break?
Other Answers:
Not everything breaks when it falls, and even a glass has to fall on something hard.
Glass (and ceramics and porcelain) is very brittle and the fall causes stresses that exceed the strength limits for the material and it shatters.
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Glass (and ceramics and porcelain) is very brittle and the fall causes stresses that exceed the strength limits for the material and it shatters.
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Gravity.
Stress increases when it hits.
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