A block of mass 3.20 kg is placed against a horizontal spring of constant k = 885 N/m and pushed so the spring compresses by 0.0550 m. HINT (a) What is the elastic potential energy of the block-spring system (in J)?  J (b) If the block is now released and the surface is frictionless, calculate the block's speed (in m/s) after leaving the spring.  m/s

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