The South Kyle onshore windfarm, situated 50 km south of Glasgow, was opened in June 2023. It has 50 turbines with a total installed capacity of 240 MW.

(a) The average wind speed at the site is around 10 m/s. How does the power in the wind relate to the wind speed? Choose one of the following options.
Is it proportional to:
• the wind speed?
• the square of the wind speed?
• the cube of the wind speed?