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oceanwalk
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Homework Statement
In static equilibrium a spring is stretched 0.25 m by a hanging mass. If the system is initially moved up to the unstretched position and released with zero velocity, determine position of the mass (in m) after 4.2s. Take the equilibrium position to be zero and up the positive direction.
Homework Equations
at equilibrium
-kx+mg = 0
m(x double dot (t)) + kx(t) = 0