Final answer:
The magnitude of centripetal acceleration is 0.5 m/s².
Step-by-step explanation:
The magnitude of centripetal acceleration can be calculated using the formula a = v² / r where v is the velocity and r is the radius. In this case, the radius is 2.0 m and the velocity is 1.0 m/s. Substituting these values into the formula, we get a = (1.0 m/s)² / 2.0 m = 0.5 m/s². Therefore, the magnitude of the centripetal acceleration is 0.5 m/s².