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physics oscillator energy

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a block of wood of mass 0.25kg is attached to one end of a spirnf og constant stiffness 100N/m. The block can oscillate horizontally on a frictionless surface, the other end of the spring being fixed.
a) calculate the maximum elastic potential energy of the system for a horizontal oscillation of amplitude 0.20m.

i tried to use the equation
but i wasn't sure if this was the right way to go about it because i couldn't figure out how i could find out the angular frequency

thanks for your help!

  • physics oscillator energy -

    Use: Ep = (1/2)kx^2 to get the elastic potential.

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