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Module 1: Ratio and proportion gears

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The gears video

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Core Mathematics - The gears video

The gears video

GEAR RATIOS SUMMARY:

Gear ratios are an example of INVERSE PROPORTION. This means that, as one
quantity increases, the other quantity decreases.

Road racing cyclists change gears to suit the conditions:

* pedalling faster in lower gears but going slower up hills or

* pedalling slower in higher gears but going faster down hills.

As this problem involves inverse proportion, the rule becomes:

View the gears video.

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