Danica traveling at a speed of 200 km/hr on a straight road applies brakes to her car at point A and reduces her speed at a uniform rate to 150 km/hr at C in a total distance of 300 meters.
a) Calculate the magnitude of the total acceleration of her car immediately after she passes point B. Assume BC to be a part of a circular path. [So, AB is a straight line while BC is a circular arc.]
b) Compute the time she took to go from A to C.