Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Incredibly useless

I feel sorry for anybody who relies on this book to get a good handle on physics. I am an A student, but I am spending obscene amounts of time trying to comprehend the material. This book (and the accompanying solutions manual) do a lousy job of walking you through the steps to solve many of the problems. The one I am particularly frustrated with is Interactive Example 3.7 (page 66), which tells you at one point to solve for time by using the quadratic formula. They do not bother to show you how they got the answer! The appendix to which it refers you for this particular example, is seriously not helpful. I am spending upwards of 25 hours per WEEKEND studying for physics, and this text does NOTHING to elucidate any of the concepts. I cannot wait to give my input to the department at the end of the semester.