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27. A spring is attached to a 2.5-kg mass on the horizontal frictionless surface. The spring is initially
stretched at a position of 7 cm. When it is released, the spring undergoes simple harmonic oscillation
with a period of 1.65 seconds. Find the spring constant, k = ?
a. 65.7 N/m
b. 11.6 N/m
c. 59.8 N/m
d. 36.3 N/m

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