When it meets other fields.
A physical principle takes on another dimension when it must work in a real object. Design contributes decisions about use; business contributes production and distribution conditions. Integration appears when these constraints are resolved together and system behavior is verified.
A way to begin.
Model a simple mechanism with a diagram or simulation. Write down its assumptions, test a known case, and find a condition where it stops behaving as expected.
A QUESTION TO EXPLORE
Which constraint turns a good idea into an engineering problem?Explore in the laboratory