To find average acceleration using average velocity, it's essential to have the complete problem statement, as context is crucial for accurate calculations. The average velocity calculated was 1.146788991 m/s over 8.72 seconds, but without knowing the final velocity, the formula a_ave=(Vf-Vi)/(Tf-Ti) cannot be applied. Multiplying average velocity by time does not yield acceleration, as it results in distance. Instead, it may be more appropriate to consider the average velocity as (Vf - Vi)/2 if initial and final velocities are known. Providing the full problem statement will help clarify the necessary calculations for determining average acceleration.