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ICSE Class 10 Physics 2015 Paper
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In the diagram below, are four pendulums suspended from the same elastic string . The length of and are equal to each other while the length of pendulum is smaller than that of . Pendulum A is set into a mode of vibrations.

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Question : 50 of 74
Marks:
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Name the type of vibrations taking place in pendulums and ?
Solution:
B and D would be in the state of force vibration.
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