Consider a body thrown up with some arbitrary initial velocity. It can be proven that the speed of the body one second before it reaches its maximum height is always the same and is independent of the initial velocity of the body.
How, or rather why is this so? What can be a simple and logical explanation for this? As a special case, it is obvious that the above is not true for any arbitrary instant of the motion. When does it 'start' becoming true, ie is it valid for 2,3... seconds before the body reaches its maximum height? Please excuse me for any wrong concepts in my question. I'm new to physics and am really interested!