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Solve this SHM, the m=2 m/s and k=8. Write a 2nd order differential equation and give...

Solve this SHM, the m=2 m/s and k=8. Write a 2nd order differential equation and give a general solution as sum of sin and cosine. then give a specific solution as x intial is 2 and v intial is -4. What time does it mass through equilibrium?
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