Strong winds can make a tall skyscraper set into a back-and-forth motion. The amplitudes of these motions are much larger at the higher floors than the lower ones. The Sears Tower in Chicago on a windy day sometime makes about 16.5 vibrations in 60 seconds. Determine the frequency and the period of vibration of the Tower. O 3.2 Hz, 0.364 s O 0.28 Hz, 3.64 s 0.28 rpm, 36 s 2.3 Hz, 0.40 s

Strong winds can make a tall skyscraper set into a back-and-forth motion. The amplitudes of these motions are much larger at the higher floors than the lower ones. The Sears Tower in Chicago on a windy day sometime makes about 16.5 vibrations in 60 seconds. Determine the frequency and the period of vibration of the Tower. O 3.2 Hz, 0.364 s O 0.28 Hz, 3.64 s 0.28 rpm, 36 s 2.3 Hz, 0.40 s