Hi, the problem I have is one dealing with static friction. The problem states: The coefficient of static friction between hard rubber and normal street pavement is about 0.8. On how steep a hill (maximum angle) can you leave a parked car? I know that the downward force is "g" and that the normal force is equal to "g" since there is no acceleration. I am just having problems finding the angle. Our textbook is lacking in examples. I am not looking for an answer but a formula to use or even a hint. Thanks in advance.