1. The problem statement, all variables and given/known data The speed, v, of an object is given by the equation v = At3 - Bt4 where t refers to time. What are the dimensions of A? (Express your answers using only m for distance and s for time.) 2. Relevant equations 3. The attempt at a solution I know the answer. A is m/s4 and B is m/s5 I just do not know why that is. I want to have an understanding of why, rather then just knowing what to do. Thank you in advance.