Ok, I have a few questions about gravity. First, is gravity's acceleration constant through the 9.8 m/s^2? Im sure that it is, but that raises a few questions for me. Instantaneously, if you throw something in the air straight up, isn't at time 0 the gravity not have taken any effect on the objects velocity as the velocity is at its max so to say, and the instant it reaches max height the object has a velocity of 0, even though its accelerating at 9.8 m/s^2 the entire time, This seems pretty weird? And lastly, why is gravity constant exactly, even though the object is moving away from the earth. Gravity just seems like a really weird force to me and im trying to better understand exactly how it works on objects. Any help would be greatly appreciated.