The diagram illustrates a setup that is used to determine the output power of an electric motor. The wheel fixed to the motor’s axle has a circumference of $0.5\,\text{m}$, and the belt passing over it is at rest when the weights have the values shown. If the wheel is turning at $20$ revolutions per second, what is the output power of the motor?
- A$300\,\text{W}$
- B$500\,\text{W}$
- C$600\,\text{W}$
- D$700\,\text{W}$