1. The problem statement, all variables and given/known data What does it mean to say that an object undergoes a deceleration? Can this term be used without ambiguity? Edit (That was straight from the book poorly written: Should say object decelerates not undergoes a deceleration) 2. Relevant equations v(t)=v0+a⋅t 3. The attempt at a solution Deceleration means less acceleration or going slower. But this can be ambiguous in terms of positive and negative: it can be a little less positive but still positive or a little less negative but still negative this same problem happens in velocity. I just want a second opinion on this the textbook does say something about asking questions and making conclusions that better a larger system of Physics. This larger teamwork based system of Physics is how it all works at our jobs apparently which is why we are learning this way; to be better prepared for our future jobs. It makes sense I can't just make up laws or rules without knowing what other people agree on/what the real accepted laws or rules are.