A block of mass 2.80 kg is placed against a horizontal spring of constant k = 865 N/m and pushed so the spring compresses by 0.0800 m. (a) What is the elastic potential energy of the block-spring system (in 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.

A block of mass 2.80 kg is placed against a horizontal spring of constant k = 865 N/m and pushed so the spring compresses by 0.0800 m. (a) What is the elastic potential energy of the block-spring system (in 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.

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Question

A block of mass 2.80 kg is placed against a horizontal spring of constant k = 865 N/m and pushed so the spring compresses by 0.0800 m.

(a)

What is the elastic potential energy of the block-spring system (in 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.

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