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Question: 1 barney is trying to demonstrate to fred how centripetal...

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1) Barney is trying to demonstrate to Fred how centripetal force works. He swings a bucket of water in a vertical circle to show that the water will remain inside. If Barney’s arms are 0.7 m long
a) What is the slowest speed that barney can swing the bucket in so that he doesn’t get wet. Express in revolutions per second.

b) Barney wants to play it safe, so he spins the bucket at twice this speed. If the bucket of water has a mass of 5 kg (a weight of about 11 lb), how heavy does the bucket feel at the very bottom of the swing? Express in N and lb)

c) What is the tension in Barney’s arm when the bucket is at the top of the swing?

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