Imagine a polymer – essentially, a plastic. These kind of materials are solid at room temperature. However, as temperature rises, they get more pliable, more easily bent, as if it’s melting without melting (turning into its liquid form)
The same goes for ice cream and most materials out there. The colder it gets, the stiffer they get.
This happens because temperature is a measure of molecules speed/energy. At a low temperature, they have less (thermal) energy and they vibrate less. It’s like they know it’s too cold and want to roll up in a blanket and stay still. These vibrations are what makes such materials mechanical problems.
Hope I made it somewhat clear!
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