Does anyone know of an equation that I would be able to use for the force of wind acting upon a baseball? I am working on the projectile motion of a baseball with air and wind resistance. I have the equation for the force of air resistance, however, I cannot find the appropriate equation for wind?
Wind is just the movement of air, so the projectile would just see a modified relative air velocity moving by it. Therefore, to account for wind you would just modify the terms in your equations involving air resistance (probably some function of object velocity $\mathbf f(\mathbf v)$) to take into account the relative velocity between the air and the object due to the wind. In other words you would replace $\mathbf f(\mathbf v)$ with $\mathbf f(\mathbf v-\mathbf w)$ where $\mathbf w$ is the velocity of the wind.