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P
l
e
ase underline your answer
for each question.
1. A car weighing 130 kN when
fully loaded is pulled slowly
up a steep inclined track by
a steel cable (see figure).
The cable has an effective
cross-sectional area of 490 mm
2
, and the angle a of the incline is 30°. Calculate the tensile
stress in the cable. (25 pts)
Answer:
AU24
Homework 1
MECHANICS OF MATERIALS
INSTRUCTOR: DR. N. HU
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