Q.

A steel beam with cross section 60 cm2 is fixed between two rigid clamps at 100 C. When the beam is heated to 350 C, the force exerted on the ends of the beam by the clamps is Y=2×1011Pa,α=12×106/ 0C

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a

3.6×106N

b

3.6×105N

c

36×105N

d

36×107N

answer is D.

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Detailed Solution

F=yAαΔθ

=2×1011×6×103×12×106×25N

=3.6×105N

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