Questions 18 and 19. A child swings a bucket tied to a rope so that the bucket rotates in perfectly horizontal circles. The circles made by the bucket all have a radius of 1.50 meters, and the bucket makes a complete revolution once every 0.500 seconds. Question 18 5 pts What is the tangential speed of the bucket? O 18.8 m/s 0 9.43 m/s 0 37.7 m/s C) 4.71 m/s D Question 19 5 pts If the child gradually slows the bucket to a stop (no more rotation) in 30 seconds, then what is the magnitude of the angular acceleration of the bucket? O 0.208 rads/s^2 O 0.556 rads/s^2 O None of these answers is correct. O 0.419 rads/s^2 O zero O 0.838 rads/s^2