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MMLU-Pro / 8325 / A spring is stretched 6 in by a mass that weighs 8lb. The mass is…

Problem

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question

A spring is stretched 6 in by a mass that weighs 8lb8 \mathrm{lb}. The mass is attached to a dashpot mechanism that has a damping constant of 0.25lb⋅s/ft0.25 \mathrm{lb} \cdot \mathrm{s} / \mathrm{ft} and is acted on by an external force of 4cos2tlb4 \cos 2 t \mathrm{lb}. If the given mass is replaced by a mass mm, determine the value of mm for which the amplitude of the steady state response is maximum.
Plain-text mathematical notation (without MathML)
A spring is stretched 6 in by a mass that weighs 8lb. The mass is attached to a dashpot mechanism that has a damping constant of 0.25lb⋅s/ft and is acted on by an external force of 4cos2tlb.
If the given mass is replaced by a mass m, determine the value of m for which the amplitude of the steady state response is maximum.
Original LaTeX notation
A spring is stretched 6 in by a mass that weighs $8 \mathrm{lb}$. The mass is attached to a dashpot mechanism that has a damping constant of $0.25 \mathrm{lb} \cdot \mathrm{s} / \mathrm{ft}$ and is acted on by an external force of $4 \cos 2 t \mathrm{lb}$.
If the given mass is replaced by a mass $m$, determine the value of $m$ for which the amplitude of the steady state response is maximum.

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