1. If a block is moving at constant velocity, can the speed change? (yes or no question) I think the answer is no. Because The scalar quanitity of the speed will be the same as the velocity, but im not sure. 2. An ice hockey puck is being shot at with 150m/s , how long time does it take for it to move 10 meters. I dont understand the question, will there be any forces/ acceleration or something or just s=v/t? 3. Is acceleration a vector? I think i know this question it is yes, becuase u usually write a with an arrow above it. 4. Which two Physical quantity is needed to determine average velocity, is it "distance" and "time" or what words do i wanna use there? And is "x" and"t" the only answer, or can "a" and "t" be an answer, or "v0" and "v_f" be an answer to this question?