When it fails to do your thinking for you
Consider a mass on a spring.2 There are known equations for predicting the behavior of a mass (like a smooth block) sliding on a table. Such systems are well studied and the resulting equations of motion depend on only a few variables: the slope of the table, its roughness, the spring constant, etc..
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North America, Australia and New Zealand will be treated to a rare total lunar eclipse on Tuesday known as a “blood moon”.
The facilities hit were located close to residential neighbourhoods and videos circulating on social media showed flames spreading towards nearby streets. There were no immediate reports of residential areas catching fire as a result.