A child's swing is pushed gently at its natural frequency and the amplitude grows large. This phenomenon is called:
AResonance, driving force matches the natural frequency
BDamping, with energy lost steadily to the surroundings
CDiffraction, since the swing bends around the air
DInterference, two waves meeting at the swing seat
Answer & Solution
Correct answer: A. Resonance, driving force matches the natural frequency
Driving at the natural frequency causes resonance, with large amplitude buildup.
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