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94. Analyzing the forces tending to drag the
M
= 5124 kg stone down the oak beam, we
find
FM
g
s
=+
sin
cos
θμ
θ
b
g
where
μ
s
= 0.22 (static friction is assumed to be at its maximum value) and the incline
angle
for the oak beam is
.
−
=°
1
39 10
23
b
g
(but the incline angle for the spruce log is
the complement of that). We note that the component of the weight of the workers (
N
of
them) which is perpendicular to the spruce log is
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 Spring '08
 Any
 Physics, Force, Friction

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