A block of mass 2.40 kg is placed against a horizontal spring of constant k = 885 N/m and pushed so the spring compresses by 0.0400 m.   (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

Physics for Scientists and Engineers: Foundations and Connections
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ISBN:9781133939146
Author:Katz, Debora M.
Publisher:Katz, Debora M.
Chapter9: Energy In Nonisolated Systems
Section: Chapter Questions
Problem 80PQ: A block of mass m = 0.250 kg is pressed against a spring resting on the bottom of a plane inclined...
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A block of mass 2.40 kg is placed against a horizontal spring of constant k = 885 N/m and pushed so the spring compresses by 0.0400 m.
 
(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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