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Amplitude and Total Energy

  1. Nov 19, 2009 #1
    A mass of 0.5 kg is attached to the end of a massless spring of spring constant 0.40 N/m. It is released from rest from an extended position. After 0.7 s, the speed of the mass is measured to be 1.75 m/s. What is the amplitude of oscillation? What is the total energy (relative to the mass at rest in the unextended position) contained in this system?

    conservation of energy

    I've tried many different attempts.
  2. jcsd
  3. Nov 19, 2009 #2
    Anyone have any help on this problem. I think I have to use conservation of energy but I really am not sure
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