A small speaker of mass three kilogram is swinging as a simple pendulum on the rope of length 0.6 m while emitting a sound of a single frequency f and power 107 W. When the pendulum is at the end of its swing: 0.11 radians from vertical position (the furthest away from the equilibrium), the speaker frequency is exactly matched by the frequency produced by 5-harmonic of the string of length 1 m. Given the speed of sound in the air (v=340m/s)
Discover the frequency of the sound emitted from the speaker when the pendulum is at the position of the maximum deviation.