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4) Which one of the following is a forced vibration? O Pulling a child back on a swing Hitting a tuning fork Mass suspended on a stretched string Vibration of a building during earthquake 5) The mechanical oscillation about an equilibrium point refers OOOO The angle of incidence is less than the angle of refraction Vibration Resonance Reverberation
4) Which one of the following is a forced vibration? O Pulling a child back on a swing Hitting a tuning fork Mass suspen
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4) Which one of the following is a forced vibration? O Pulling a child back on a swing Hitting a tuning fork Mass suspen
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