Conceptual Physics (12th Edition)

Published by Addison-Wesley
ISBN 10: 0321909100
ISBN 13: 978-0-32190-910-7

Chapter 20 - Think and Explain: 76

Answer

The floor has a natural frequency of vibration. Certain dance steps vibrate the floor at its natural frequency, dramatically increasing the amplitude of its oscillations, and causing the floor to heave. In other words, certain dance steps cause resonance.
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