Method for solving Simple Harmonic Motion problems.

We find the frequency of oscillation in Three different situations, one linear, one rotatory and one involving Archimedes' principle. A floating black is pushed down and released so it bobs up and down. What is the frequency?

[@suchetabanerjee404]

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[@tuneegaEducation]

Thank you! I will be posting videos for most of the 11th topics. Please continue to watch.