When a tensile or compressive force (P) acts on a body, the change in its length is given by

Related MCQs

• A strip of steel (E = 200 GPa, 0.25) has a length of 1 m, width of 200 mm and thickness of 10 mm. A line of length 1 m is drawn parallel to its length on one of its side surfaces. When the strip is subjected to an axial tensile force of 100 kN, the length of the line will be                  mm.
• The change in length of a rod of uniform circular cross section was found to be 2 mm for some applied force. The change in length of a rod of the same material and length but of half the diameter subjected to the same force will be Mm
• The change in length of a rod of uniform cross section was found to be 2 mm for some applied force. The change in length of a rod of the same material and length but of twice the cross section area subjected to the same force will be__ mm.
• When a body is subjected to two equal and opposite pushes, as a result of which the body tends to reduce its length, the stress and strain induced is compressive.
• The tensile force at a distance y from support in a vertical hanging bar of length L whch carries a load P at the bottom is equal to---- where w = weight per unit length
• A body is subjected to two normal stresses 20 kN / m2 (tensile) and 10 kN / m2 (compressive) acting perpendicular to each other. The maximum shear stress is
• A body is subjected to two normal stresses of 200 kN/m2 (tensile) and 100 kN/m2 (compressive) acting mutually perpendicular to each other. The maximum sher stress is equal to
• A body is subjected to a tensile stress of 1200 MPa on one plane and another tensile stress of 600 MPa on a plane at right angles to the former. It is also subjected to a shear stress of 400 MPa on the same planes. The maximum normal stress will be
• When a body is subjected to a direct tensile stress (?), maximum normal stress is equal to the direct tensile stress.
• If an axial force of 15 kN is applied to a rod of 25 mm diameter, length 300 mm, the change in length of the rod was observed to be 0.045 mm. The modulus of elasticity of the material is 200 GPa. The strain in the rod will be ____ _.