Speed-time graphs show speed on the vertical axis and time on the horizontal axis. The gradient of a speed-time graph represents acceleration because: gradient = \( \frac {\text{change in ...
The rate of air flow varies depending on the properties of the channel through which it flows; narrow channels increase its velocity, and wide channels decrease it. Why does wind blow in gusts and not ...
gradient = \(\frac{change~in~y}{change~in~x} = \frac{change~in~speed}{change~in~time} = \) \( \frac{change~in~metres~per~second}{change~in~seconds}\) = metres per ...
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