angular velocity

When is a goal not a goal?

Remember Frank Lampard's disallowed goal in the 2010 World Cup match against Germany? The ball hit the crossbar, landed well behind the line but then bounced out again. And it all happened too quickly for the ref to spot it was a goal. How these kind of (non)-goals happen and what can we do about them?

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Outer space: What goes up must come down

How large are the forces acting on a gymnast swinging on the high bar?

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Outer space: Wagons Roll
The concept of a speed limit seems a simple one - until you think what can happen when a speed camera clocks a rotating wheel...
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Unspinning the boomerang
In this article, we look at the physics behind the curved flight path of a returning boomerang, and explain that boomerangs are really a kind of gyroscope. We even show you how to bang up a boomerang yourself!
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