A Few Questions Pertaining to Irodov's "Problems in General Physics" I've been informed that Irodov's "Problems in General Physics" is a renowned text in the realm of physics problem-solving, and I've downloaded it off the Net not too long ago. I've only skimmed cursorily through the "Kinematics" section though; there's always a different reading ambience when you're doing it off your the screen on your monitor as compared to doing it off a nicely propped book on your table. 1) How do Irodov's problems compare with that of the IPhO's in terms of relative levels of difficulty? As far as I'm concerned, the IPhO does not require any explicit use of calculus and differential equations. 2) I've downloaded an ad hoc solutions manual, and I'm solemnly deliberating upon its utility as a solid reference material after a) I've attempted a problem and felt that it will be counter-productive to proceed any longer. To divagate from the objective of this post for a moment, I've been informed from many problem-solving references that vicariously experiencing the processes of problem-solving will strengthen one's problem solving skills. I acknowledge that extended periods of time expended on a problem will empower one's psychological capacities in the confrontation of a difficult problem, but I don't believe that this necessarily comprises the best way of acquiring problem-solving capabilities. An alternative example will be to learn and apply Polya's methods of heuristics. b) I've completed a problem (or not) and wish to seek alternative routes to the answer. Is this an effective method of learning, and if not, what modifications can any of you more experienced problem-solvers propose? P.S. I'm using the solutions manual by Abhay Kumar Singh.