Specifically it's i) that I need help with. I don't know it's maximum speed, or how to approach the question in general. The values from the question above should be correct aswell, but I just dont know how to find the maximum speed and then solve the apparent frequency for i)

h) Calculate the acceleration of the mass in the gravitational field determined above when it is displaced 7.0' from the equilibrium. g = 9.87 m/s ? A = 70 a = q sino = 9.87 m /s' sin 7 = 1. 2028.- m/s 1701 = 1. 2 m /s i) The mass is pulled aside to a height of 35.0 cm above its equilibrium position and released. The pendulum whistles with an emitted frequency of 19.9 Hz, which is below the audible frequency range of a human ear. But you can hear the pendulum as it approaches you. What is the apparent frequency of the whistle as it swings at its maximum speed towards you (in the gravitational field found above)? Assume the speed of sound is 343 m/s. h= 35.0cm Fp = 19 . 9 Hz fo = ? 635,0cm Vsound = 343m /5