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6
82
4
2
3.5 10 N
15.2
(3.6 10 N/m )(6.4 10 m )
n
−
×
≥=
××
Thus 16 bolts are needed.
61. We denote the mass of the slab as
m
, its density as
ρ
, and volume as
VL
T
W
=
. The
angle of inclination is
26
θ
=°
.
(a) The component of the weight of the slab along the incline is
1
32
7
sin
sin
kg/m )(43m)(2.5m)(12m)(9.8m/s )sin 26
1.8 10 N.
Fm
g
V
g
3
==
= (3.2×10
° ≈
×
(b) The static force of friction is
7
cos
cos
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This note was uploaded on 05/17/2011 for the course PHY 2049 taught by Professor Any during the Spring '08 term at University of Florida.
 Spring '08
 Any
 Physics, Mass

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