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Total energy of a particle executing sim...

Total energy of a particle executing simple harmonic motion is 400 erg and the maximum force acting on the particle is 100 dyn. If the time period is 2 s and the initial phase is `30^(@)`, then write down the equation of motion. What is the mass of the particle?

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The correct Answer is:
`x=8cos(pit+pi/6)`cm, 1.27 g
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