An Object Is Attached to a Coiled Spring $\mathrm { d } = 6 + 4 \cos 3 \pi \mathrm { t }$

question 246

Multiple Choice

An object is attached to a coiled spring. The object is pulled down (negative direction from the rest position) and
then released. Write an equation for the distance of the object from its rest position after t seconds.
- $\mathrm { d } = 6 + 4 \cos 3 \pi \mathrm { t }$ meters

• A) displacement \(= 4\) meters; period \(= \frac { 2 } { 3 }\) seconds; \(\mathrm { f } = \frac { 3 } { 2 }\) oscillations/second
• B) displacement \(= 4\) meters; period \(= \frac { 3 } { 2 }\) seconds; \(\mathrm { f } = \frac { 2 } { 3 }\) oscillations/second
• C) displacement \(= 10\) meters; period \(= \frac { 2 } { 3 } \pi\) seconds; \(\mathrm { f } = \frac { 3 } { 2 \pi }\) oscillations/second
• D) displacement \(= 10\) meters; period \(= \frac { 2 } { 3 }\) seconds; \(\mathrm { f } = \frac { 3 } { 2 }\) oscillations/second

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