1. The problem statement, all variables and given/known data A 18g rubber stopper is suspended by a 45-cm string from the rear view mirror of a car. As the car accelerates eastward, the string makes an angle of 5.1 degrees with the vertical. Determine the acceleration of the car. 2. Relevant equations 3. The attempt at a solution I'm totally stumped. There are no forces or anything given, not even sure what the diagram should look like : |. Help !