I got this problem in physics today and i have no idea how to do it: You are on a firing team in Iraq. You are manning a piece of artillery that fires a 15kg. projectile out of a 12mm barrel. with a constant in barrel force of 1500N. The mew(i think that is how you spell it) is .22. the barrel is tilted at 30 degrees and the wind is blowing directly at you at you with 15N of force. An enemy vehicle is coming directly at you at 40 m/s and is currently at 1000m away. When do you fire? I need help on finiding the acceleration, f applied in both x and y directions, normal force and all of the rest of the info!!