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**87. A 0.200-m uniform bar has a mass of 0.750 kg and is released
from rest in the vertical position, as the drawing indicates. The spring
is initially unstrained and has a spring constant of k = 25.0 N/m.
Find the tangential speed with which end A strikes the horizontal
surface.
0.100 m
Pivot
(frictionless)
A
0.100 m
0.100 m

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