Calculation of Distance, Velocity and Acceleration

Formula 1: Suitable for uniform linear motion. If it is a variable-speed movement, V must be the average speed of the whole process;

Formula 2: Suitable for uniformly accelerated linear motion;

Equation 3: The same applies to uniformly accelerated linear motion.

The reason for the conflict is that it cannot be substituted at will. The average speed of uniformly accelerated motion with initial speed of 0 is equal to: V level = =0.5vt, so the substitution is correct.