Okay, this is highschool physics I know but I still need to ask it. Say I give something a constant acceleration A straight up into the air (A = [0,0,+Az]). If I ignore drag, then the object's z-velocity as a function of time with this constant acceleration will be (Az - g)t (where Az is the z-component of the acceleration) if the initial z-velocity at time t = 0 is 0. Am I correct? Next question: say that an object is travelling straight up through the air with a constant velocity V0. Is the object's z-position as a function of time equal to V0t - 0.5gt^2 + Z0 (where Z0 is the initial z position) or is it something else? Sorry if I didn't word these questions right - I'm still very new to this.