Problems 295
The member has a uniform rectangular cross section
with the dimensions of in. 4 in., as shown in the
accompanying figure.1
420 cm
10 cm
5 mm
Problem 10.29
10.28.A 20-cm-diameter rod is subjected to a tensile load of
1000N at one end and is fixed at the other end. Cal-
culate the deflection of the rod if it is 50-cm long.
10.29.A structural member with a rectangular cross section
as shown in the accompanying figure is used to support
a load of 2500 N. What type of material do you rec-
ommend be used to carry the load safely? Base your
calculations on the yield strength and a factor of safety
of 2.0.4 m
O
2 m
8 m
Sign 1 m
Problem 10.31
10.32.Determine the moment created by the weight of the
lamp about pointO. The dimensions of the street light
post and arm are shown in the accompanying figure.
The lamp weighs 20 lb.O
18 ft
5 ft
Problem 10.32
10.30.The tire wrench shown in the accompanying figure is
used to tighten the bolt on a wheel. Given the infor-
mation on the diagram, determine the moment about
pointOfor the two loading situations shown:
a. pushing perpendicular to the wrench arm
b. pushing at a 75angle, as shown
10.31.Determine the moment created by the weight of
the suspended sign about pointO. Dimensions of the
sign and the support are shown in the accompany-
ing figure. The sign is 2-mm thick and is made of
aluminum.L = 10 in.
A
F = 500 lb Problem 10.27
L = 2 ftF = 50 lb
75
O
Problem 10.30
62080_10_ch10_p251-302.qxd 5/22/10 12:32 AM Page 295
Copyright 2010 Cengage Learning. All Rights Reserved. May not be copied, scanned, or duplicated, in whole or in part. Due to electronic rights, some third party content may be suppressed from the eBook and/or eChapter(s).圀圀圀⸀夀䄀娀䐀䄀一倀刀䔀匀匀⸀䌀伀䴀圀圀圀⸀夀䄀娀䐀䄀一倀刀䔀匀匀⸀䌀伀䴀