Solve the Problem $\frac { 1 } { 7 }$ Second, Determine a Trigonometric Model That Gives the Position of Pulled

Solve the problem.
-A weight attached to a spring is pulled down 5 inches below the equilibrium position. Assuming that the period of the system is $\frac { 1 } { 7 }$ second, determine a trigonometric model that gives the position of the weight at time $t$ seconds.

A) $y = - 5 \cos 7 \pi t$
B) $y = - 5 \cos 14 \pi t$
C) $y = 5 \cos 14 \pi t$
D) $y = 5 \cos \frac { 1 } { 7 } t$

Correct Answer:

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