A block of mass 3.20 kg is placed against a horizontal spring of constant k = 855 N/m and pushed so the spring compresses by 0.0650 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
