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Question

A bar of cross-section A is subjected to equal and opposite tensile forces at its ends. Consider a plane section of the bar whose normal makes an angle θ with the axis of the bar.
What is the shearing stress on this plane?

A
Shearing stress = F2Asin2θ
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B

Shearing stress = F2Asin3θ
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C

Shearing stress = F2Asin4θ
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D

Shearing stress = F2Asinθ
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Solution

The correct option is A Shearing stress = F2Asin2θ

Shearing stress=forcearea
Shearing stress applied on the top face
So, F=Fsinθ
Area of plane section perpendicular to the force =Asecθ
Shearing stress=FsinθAsecθ
=2.Fsinθcosθ2.A
=F(2sinθcosθ)2A
=F2Asin2θ

1094660_984769_ans_79b50aa44f4f446097f7297a9e6a08b0.JPG

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