Final answer:
The object's acceleration cannot be determined without knowing the radius of the circular track.
Step-by-step explanation:
An object moving with a constant speed on a circular track experiences centripetal acceleration. This acceleration is directed towards the center of the circle and its magnitude is given by the equation:
acceleration = (velocity)² / radius
In this case, the speed of the object is 30 m/s and the radius of the track is not given. Without the radius, we cannot determine the exact value of the acceleration, so the correct answer is indeterminate. Option A: Zero acceleration, would be incorrect, because centripetal acceleration is present in circular motion.