Entry Test MCQ :: Waves

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A simple pendulum has a bob of mass m and its frequency is f. If we replaced the bob with a heavier one say of 2m then that will be its new frequency?

[A].	1/4f	[B].	1/2f
[C].	frequency lower than 20 Hz	[D].	2f

Answer: Option C

azmat said:

plz explain

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