1. The problem statement, all variables and given/known data A 1200 kg car travels at 50 km/h and experiences air resistance of 5000 N and road friction of 2200 N. If the wheels push with a force of 7500 N, what is the car's acceleration? 2. Relevant equations a = ƩF/m 3. The attempt at a solution I got ƩF = 8590 N [E52°S] then plugged it into the equation, but it did not work to the correct answer of 0.250m/s^2. I'm thinking I probably had to make use of the 50 km/h variable somewhere, which I didn't. When and where would that apply...?