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A 2.1 kg mass is connected to a spring (k=175 N/m) and is sliding on a...

A 2.1 kg mass is connected to a spring (k=175 N/m) and is sliding on a horizontal frictionless surface. The mass is given an initial displacement of +14 cm and released with an initial velocity of -19 cm/s. Determine the acceleration of the spring at t=1.2 seconds.
(include units with answer)

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