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SERCP$1113.$QQ$\mathrm{.}004.$

An object of mass $m$ is attached to a horizontal spring, stretched to a displacement A from equilibrium and released, undergoing harmonic oscillations on a frictionless surface with period $T_0.$ The experiment is then repeated with a mass of $4$ m $.$ What's the new period of oscillation?

$2T_0$

$\frac{T_0}{4}$

$T_0$

$\frac{T_0}{2}$

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