physics
posted by Viet .
A 20lb weight is hung on an 18in. spring stretching it 6 in. The weight is pulled down 5 in. and 5 lb are added to the weight. If the weight is now released with a downward velocity of y0 in./sec, find the position of mass relative to the equilibrium in terms of y0 and valid for any time t >= 0.

hookes law
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