Question
Asked Dec 9, 2019
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A block of mass 3.8 kg is placed against a horizontal spring of constant
k = 735 N/m and pushed so the spring compresses by 0.0550 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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Expert Answer

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(a) The elastic potential energy of...

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U= [1) kx² (735N/m)(0.0550m) =1.112J

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