1. The problem statement, all variables and given/known data In which conditions the average speed equals the Average of the Speeds? 2. Relevant equations Average speed= (Xf-Xo)/(tf-to) Average of the speeds= (vf+vo)/2 3. The attempt at a solution I tried to set up a formula for vf and vo, but it would be false to determine that vf=xf/tf, because if vf=0, xf=2 and tf=1 ->vf=2/1 which is not 0. I tried also to set vx=a*t + vo, but I'm getting nowhere. Please help :) I know that it is the case when there is no acceleration. But I'm trying to figure if there is other cases.