Average velocity, average velocity, instantaneous velocity, instantaneous velocity, average acceleration, instantaneous acceleration The size of vector is scalar. When similar concepts are used in the above concepts, will there be a logic error?

Average velocity, average velocity, instantaneous velocity, instantaneous velocity, average acceleration, instantaneous acceleration The size of vector is scalar. When similar concepts are used in the above concepts, will there be a logic error?

There will be errors
For example, the average velocity is the ratio of displacement to time, and the average velocity is the ratio of distance to time. The displacement is usually not equal to the distance. The displacement is the length of the straight line between the initial and final positions, and the distance is the length of the motion path. The displacement is independent of the path, but the distance is related to the motion path