a telephone diaphragm executes damped vibration .for a displacement of 0.01 mm the restoring force is 10^4 dyne .the retarding force is 4×10^3 dynes for a velocity of 2 .5 cm /sec if the effective mass of the diaphragm ,treated as a particle is 1 gm( 1) what is the angular frequency ??( 2)write down the differential equation of motion??
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