| Exam Board | OCR |
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| Module | PURE |
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| Topic | Exponential Functions |
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6 The power output, \(P\) watts, of a certain wind turbine is proportional to the cube of the wind speed \(v \mathrm {~ms} ^ { - 1 }\).
When \(v = 3.6 , P = 50\).
Determine the wind speed that will give a power output of 225 watts.