Car B turns such that its speed is increased by (a1)B = (0.5et) m/s2, where t is in second...

Car B turns such that its speed is increased by (a1)B = (0.5et) m/s2, where t is in seconds. If the car starts from rest when  = 0°, determine the magnitudes of its velocity and acceleration when the arm AB rotates  = 30°. Neglect the size of the car.