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A block with mass 4 kg is attached to a spring with spring constant k = 200 N/m and compressed 3 m from its
equilibrium point and released from rest on frictionless horizontal surface. At t 0.1 s the block is passing through
equilibrium point with maximum speed. Determine the phase angle.
Select one:
a. 9 degree
b. -32 degree
C. 180 degree
d. 0 degree
e. 50 degree
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