1. The problem statement, all variables and given/known data Determine the Magnitude of the instantaneous velocity at T=5s Function is x=AT^2 + B A=2.1m/s^2 B=2.8 M 2. Relevant equations The previous questions answered on this problem are: AVG Velocity is 16.8 Displacement is 33.6 from 3s to 5s 3. The attempt at a solution I'm not sure how to find either magnitude or instantaneous velocity. I need it broken down to the most basic steps to understand.