Suppose the ends of a 20-m long steel beam are rigidly clamped at 0°C to prevent expansion. The rail has a cross-sectional area of 15 cm2 . What force does the beam exert when it is heated to 40°C? (asteel = 1.1 × 10^-5/C°, Ysteel = 2.0 × 10^11 N/m2)
a. 2.6 × 10^5 N
c. 1.3 × 10^5 N
b. 5.6 × 10^4 N
d. 6.5 × 10^2 N
C
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a.
.
b.
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