1. The problem statement, all variables and given/known data Apologies in advance if this problem has been brought here before, I searched and couldn't find it. The automobile has a mass of 1.7 Mg and center of mass at G. Both the front and rear brakes are locked. Take μs = 0.3 Determine the towing force F required to move the car. 2. Relevant equations ΣM = 0 ΣFx = 0 ΣFy = 0 friction = μs * normal force 3. The attempt at a solution The previous question to this was identical (although with different values), but with only the rear brakes locked. I summed the moments about A to find the reaction at B (normal force), and then multiplied that by the coefficient of static friction to find the frictional force, and solved for F using the horizontal force equation. I tried the same approach for this problem. Summed the moments about A to find the reaction at B, and summed the forces in the Y-direction to find the reaction at A. I then multiplied those by the coefficient of friction to find their respective frictional forces. Then I summed the forces in the X-direction to solve for F. Wrong. Clearly this approach is incorrect. Am I way off? My thoughts are: the frictional force at A is greater than at B, will that have an effect? Does tipping somehow come into play in this problem? Thanks in advance for any help you can offer. I tried to follow the guidelines, but I can show more work if need be.