Final answer:
The information given pertains to a bus moving in a straight line, not a curved path, so radial acceleration is not applicable and cannot be calculated from the provided data.
Step-by-step explanation:
The radial acceleration of a bus generally refers to the acceleration towards the center of a circular path when the bus is moving in a curve. However, based on the provided context, the stated problem does not describe the bus following a circular path, but rather accelerating in a straight line, maintaining constant speed, and then decelerating uniformly. Therefore, radial acceleration would not apply in this case and cannot be calculated from the given information.
In typical situations where an object is in circular motion, radial (or centripetal) acceleration can be calculated using the formula ac = v2 / r, where v is the tangential velocity and r is the radius of the circular path. However, since the motion described does not involve a curve, this concept is not applicable to the information provided in the question.