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    A mass oscillating at the end of a spring

    1. A 250-g object hangs from a spring and oscillates with an amplitude of 5.42 cm. The spring constant is 4.80 N/m. a) What is the acceleration of the object when the displacement is 4.27 cm [down]? I put: m=0.25 kg d=0.0542 m k=48 N/m x=0.0427m Therefore: F=kx which leads to a=kx/m a=(48...