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

###### Question details

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?