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Each 0.40-kg ball is attached to the end of the light elastic rod and deflects 4.8 mm when a 2.4-N force is statically applied to the ball. If
the central collar is given a vertical harmonic movement with a frequency of 4.4 Hz and an amplitude of 3.1 mm, find the amplitude yo
of vertical vibration of each ball.
0.40 kg
Answer: Yo =
i
0.40 kg
mm

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