00:06:00

#### Centripetal force – how do we measure it?

A short video showing a simple classroom method of checking the way in which this force is related to mass, speed and radius.

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00:11:00

#### Crater Formation in Sand

A description and demonstration of the way in which craters formed by dropping objects into sand can be linked to some elementary physics

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00:14:00

#### Going round in circles – how do we do it?

A presentation showing both the ideas about centripetal force and a simple classroom method of checking the way in which this force is related to mass, speed and radius.

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