I don't want to do that in my head, get this far and make a careless mistake four point nine divided by four is one point two two five so this is, so our maximum displacement is going to be one point two two five times our total time in the air, total time in the air squared, witch is a pretty, witch is a pretty straight forward, witch is a pretty straight forward calculation so this is, this is our max displacement, kind of how far do we, how high are we getting displaced, right when, right when that ball is stationary, or is, is , is no net velocity just for a moment and starts decelerating downwards, so we can use that is a ball is in the air for five seconds we can verify our computation from the last video it would, our max velocity is one point two two five times five squared which is twenty five, will give us thirty point six two five, that's what we got in the last video if the balls in the air for, i don't know two point three seconds, so its one point two, two, five times two point three squared, then that means that it went six point four, eight meters in the air, so anyway I just wanted to give you a, a simply expression that gives you, that gives you the maximum displacement from the ground, assuming air resistance is negligible as a function of the total time in the air and I don't know, I find that pretty fun and it's, it's a neat game to play