The change in length due to a tensile or compressive force acting on a body is given by (where P = Tensile or compressive force acting on the body, l = Original length of the body, A = Cross-sectional area of the body, and E = Young's modulus for the material of the body)
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Strength of Materials problems
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1. The distance between the centre of a rivet hole to the nearest edge of plate, is called
Correct Answer: at right angle to the plane in which the beam bends
3. When a body is subjected to a direct tensile stress (?) in one plane, then tangential or shear stress on an oblique section of the body inclined at an angle ? to the normal of the section is
6. A steel bar 2 m long, 20 mm wide and 10 mm thick is subjected to a pull of 2 kN. If the same bar is subjected to a push of 2 kN, the Poission's ratio of the bar in tension will be __________ the Poisson's ratio for the bar in compression.
9. When a body is subjected to a direct tensile stress (?) in one plane, then normal stress on an oblique section of the body inclined at an angle ? to the normal of the section is