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A spring streches 0.3m when a 2-kg weight hangs from it. (a)What is the spring constant?...

A spring streches 0.3m when a 2-kg weight hangs from it. (a)What is the spring constant? (b)What will be the frequency and amplitude of vibration if the weight is pulled down 0.2m more and released so that it vibrates up and down?

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