Actually, that is only true if you start from a position considered to be zero. Otherwise, a more general function for position as a function of time given constant acceleration is:
Where is the initial velocity and is the initial position.
What else did you want to know about this? By the way, it generally helps with the communication process if you take the time to actually ask a question. Saves us poor tutors from having to GUESS WHAT IT IS YOU WANT!
