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What is the frequency of oscillation of ...

What is the frequency of oscillation of a simple pendulum mounted in a cabin that is freely falling under gravity?

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Gravity disappears for a man under free fall. Hence, the frequency of the simple pendulum under this situation is zero
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BINA LIBRARY-OSCILLATIONS-EXERCISE
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  10. Show with example how an accelerating body can have zero velocity.

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  18. A particle starts oscillating simple harmonically from its equilibrium...

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