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Chapter 15 Oscillations and Waves

The diaphragm of a speaker has a mass of 50.0 g and responds to a signal of 2.0 kHz by moving back and forth with an amplitude of 1.8 ×10 −4 m at that frequency. (a) What is the maximum force acting on the diaphragm? ( )2 ( )2 2 2 ∑F = Fmax = ma max = m Aω = mA 2πf = 4π mAf The value is F max =1400 N.