a. Explain what is meant by a centripetal acceleration.
b. A teacher swings a bucket of water, of total mass 5.4 kg, round in a vertical circle of diameter 1.8 m.
i. Calculate the minimum speed that the bucket must be swung at so that the water remains in the bucket at the top of the circle.
ii. Assuming that the speed remains constant, what will be the force on the teacher’s hand when the bucket is at the bottom of the circle?