Substrate Record: qid 8636

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qid 8636 · math

Question: A mass weighing $8 \mathrm{lb}$ stretches a spring 1.5 in. The mass is also attached to a damper with coefficient $\gamma$. Determine the value of $\gamma$ for which the system is critically damped; be sure to give the units for $\gamma$

1. 10 $\mathrm{lb} \cdot \mathrm{s} / \mathrm{ft}$
2. 2 $\mathrm{lb} \cdot \mathrm{s} / \mathrm{ft}$
3. 4 $\mathrm{lb} \cdot \mathrm{s} / \mathrm{ft}$
4. 14 $\mathrm{lb} \cdot \mathrm{s} / \mathrm{ft}$
5. 6 $\mathrm{lb} \cdot \mathrm{s} / \mathrm{ft}$
6. 20 $\mathrm{lb} \cdot \mathrm{s} / \mathrm{ft}$
7. 16 $\mathrm{lb} \cdot \mathrm{s} / \mathrm{ft}$
8. 18 $\mathrm{lb} \cdot \mathrm{s} / \mathrm{ft}$
9. 12 $\mathrm{lb} \cdot \mathrm{s} / \mathrm{ft}$
10. 8 $\mathrm{lb} \cdot \mathrm{s} / \mathrm{ft}$

Our answer: J. 8 $\mathrm{lb} \cdot \mathrm{s} / \mathrm{ft}$ Source quote machine-checked (exact quote)

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