The car is traveling at a constant speed of 30 m/s. The driver then applies the brakes at A and thereby reduces the car's speed at the rate of at=(-0.08v)m/s^s where v is in m/s. Determine the acceleration of the car just before it reaches point C on the circular curve. It takes 15s for the car to travel from A to C. A to B = 100m, and BC is a circle with an angle of 45 degrees.