Hello, Recently, I had been looking at Physics problems, and Physics word problems to be more specific. My question is, are simplifying assumptions required in physics-math-related problems? Like, you must neglect air resistance because it is a simplifying assumption right? Is this true? And the answer with the simplest model will be correct because it is a convention to make simplifying assumptions in physics problems when writing, reading and answering them right?? I just want to confirm this thought. From http://nrich.maths.org/6631 Thanks!