#$&* course Phy 231 We can write the average velocity and average acceleration in a formula and find their quantities. V-BAR stands for the average velocity and A-BAR stands for the average acceleration. To find these values, we use the V-BAR formula: (change in position)/(change in time) or (delta P)/(delta T). The A-BAR formula is (change in velocity)/(change in time) or (delta V)/(delta T). An easier understanding of what these formulas represent are derivatives. If we have a formula in terms of Y, then the derivative of that formula is velocity and then the derivative of velocity is acceleration.