So I'm writing a Scientific Lab Inquiry (college research lab write up), and my professor pointed out a major error in my assumption of air/mathematics but I can't for the life of me figure out what is wrong or how to fix it. Attached is a copy of the paper in all it's glory/infamy. There's a few comments on there, the major one I want to focus on is where he points out that the acceleration for the air resistance is incorrect. That is the primary part we're focusing on since that alone throws off all calculations/assumptions for the rest of the paper, but if you have any other feedback it'd be appreciated since I'm not used to this type of writing. But to sum it up: I need help determining the equations of projectile motion with air resistance calculated in. I WAS using a discrete method since I'm using Excel and I can just plug in the formula from the data and just have it generate everything, rather then try using a continuous method which I assume would involve programming Thanks in advance for your help on the matter!