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Math Help - Simple Harmonic motion

  1. #1
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    Simple Harmonic motion

    I got this question in trig:

    An object is attached to a spring. The object is pulled down 4 cm and released. It returns to its lowest point after 2 seconds. Write an equation modeling the position of the object as a function of time.

    They don't say anything about a spring constant K, so I don't get it.
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  2. #2
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    TheEmptySet's Avatar
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    Since the object is undergoing simple harmonic motion we know the amplitude is 4cm and the period is 2 seconds. We also know that y(0)=-4

    Now just use this information to construct the appropriate Trig function.
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