Help me understand the components of a parabola as created by a physical object in normal gravity. The object has some forward velocity, some upward velocity, and at some point some downward velocity. Is this correct? Is it safe to say, therefore, that at some point the parabola's vertical-axis velocity is zero? This is at the apex, correct? Please tell me more about how to describe it, and if my assumptions are correct. Are there any other places where its characteristics can be predicted?