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Problem:
Simple harmonic motion (SHM) is a technical term used to describe a certain kind of idealised oscillation. Practically all the oscillations that one can see directly in the natural world are much more complicated than SHM. Why then do physicists make such a big deal out of studying SHM?
A: It is the only kind of oscillation that can be described mathematically
B: Any real oscillation can be analysed as a superposition (sum or integral) of SHMs with different frequencies.
C: Physics is concerned mainly with the unnatural world.
D: Students are too stupid to appreciate the real world.
E: It is good torture or students
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