Angular motion

There are 3 NRICH Mathematical resources connected to Angular motion
Whirlyball
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Whirlyball

Age
16 to 18
Challenge level
filled star filled star empty star
Whirl a conker around in a horizontal circle on a piece of string. What is the smallest angular speed with which it can whirl?
Turning the Place Over
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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?
Eclipses of the Sun
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Eclipses of the Sun

Mathematics has allowed us now to measure lots of things about eclipses and so calculate exactly when they will happen, where they can be seen from, and what they will look like.