An iron bar (Young's modulus =1011 N/m2, α=10-6/0C) 1m long and 10-3 m2 in area is
heated from 20 0C to 120 0C without being allowed to bend or expand. Find the compressive force
in newtons developed inside the bar.
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Answer:
F=AY× alpha ×Del theta
F=10^-3×10^11×10^-6×100
F=10000 N
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It is is mentioned in the question that the iron rid isn't allowed to bend or compress this means that the iron rid is connected to a rigid support across it's ends
As it's not allowed to expand or compress thermal stress is produced
pls refer the attachment
I hope this helps ( ╹▽╹ )
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