Forces involved in making a car "airborne" This should be a fairly straightforward question. A car with a mass of 7420 pounds is going up a hill of slope between 5 and 45 degrees. Assuming a maximum speed of 90 miles per hour, is it possible, and, if so, what speed and angle are necessary for the car to overcome the forces of gravity and become "airborne", even for a moment. Since it is possible for there to be multiple answers, either a list of angles and speeds, or an equation for the derivation thereof would be helpful. Thank you for your time.