An Object Is Attached to a Coiled Spring $= 8 \mathrm {~cm}$

question 243

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.
-amplitude $= 8 \mathrm {~cm}$ ; period $= 4$ seconds

• A) \(\mathrm { d } = - 8 \cos \frac { 1 } { 2 } \pi \mathrm { t }\)
• B) \(d = - 4 \cos \frac { 1 } { 4 } \pi t\)
• C) \(d = - 8 \sin \frac { 1 } { 2 } \pi t\)
• D) \(\mathrm { d } = - 8 \cos \frac { \pi } { 4 } \mathrm { t }\)

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