In an amusement park a driver demonstrates a loop-to-loop trick with a car inside a vertical circular track of radius r. The car is initially at rest at the bottom of the track and starts to speed up with a constant tangential acceleration of a, = 10m/s2. Find the magnitude of total acceleration at t = V2s. O a. 11.2m/s2 O b. 10v5m/s2 r=10m O c. 12V3m/s2 O d. 18.5m/s2 O e. 23m/s2 Of. 20/V2m/s2 O g. 8v/6m/s2