Angular motion

problem
Favourite

Whirlyball

Age

16 to 18

Challenge level

2 out of 3

Whirl a conker around in a horizontal circle on a piece of string. What is the smallest angular speed with which it can whirl?
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Turning the Place Over

As part of Liverpool08 European Capital of Culture there were a huge number of events and displays. One of the art installations was called "Turning the Place Over". Can you find our how it works?