Projectile motion air resistance calculator - tutorial?? I am not familiar with the terms/words of physics in English, but I hope you can excuse me. I need a tutorial for how to calculate the air resistance in a projectile motion. I want to do it with my calculator and that's why I came here. I wonder if any of you might know about such a tutorial, or if you want to guide me right here. I use a Texas Instruments TI-84 Plus. If you want to guide me right here it would be for my advantage to use these values: Formula --> F = (1/2)CρAv2 C = 0.45 Air density ρ = 1.22 kg/m3 Mass m = 2.58 g A = π*r2, r = 1.91 cm V0 = 25 m/s anlge = 40° Please try to be clear when explain.