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A uniform bar of square cross-section is lying along a frictionless horizontal surface. A horizontal force is applied to pull it from one of its ends, then
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Important Questions on Mechanical Properties of Solids

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Agniveer Vayu
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Achieve Indian Airforce Agniveer Vayu Physics Practice Book>Chapter 9 - Mechanical Properties of Solids>Exercise>Q 8
A steel rod of length 4 m is placed on a smooth horizontal plane. If it is heated from 0oC to 1000oC, what is the longitudinal strain developed in it?  α steel = 1.2 × 1 0 - 5 / ∘ C .
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Agniveer Vayu
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Achieve Indian Airforce Agniveer Vayu Physics Practice Book>Chapter 9 - Mechanical Properties of Solids>Exercise>Q 9
A 50 kg girl wearing high heel shoes balances on a single heel. The heel is circular with a diameter of 1.0 cm. What is the pressure exerted on the horizontal floor?
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Agniveer Vayu
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Achieve Indian Airforce Agniveer Vayu Physics Practice Book>Chapter 9 - Mechanical Properties of Solids>Exercise>Q 10
A copper wire and a steel wire of the same diameter and length are connected end to end and a force is applied. The force stretches their combined length by 1 cm. The two wires will have
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Agniveer Vayu
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Achieve Indian Airforce Agniveer Vayu Physics Practice Book>Chapter 9 - Mechanical Properties of Solids>Exercise>Q 1
The adjacent graph shows the extension Δl of a wire of length l m suspended from the top of a roof at one end and with a load W connected to the other end. If the cross-sectional area of the wire is 10-6 m2, calculate the Young's modulus of the material of the wire -Δl×10-4m


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Agniveer Vayu
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Achieve Indian Airforce Agniveer Vayu Physics Practice Book>Chapter 9 - Mechanical Properties of Solids>Exercise>Q 2
The bulk modulus of water is 2×109 N m-2. The change in pressure required to increase the density of water by 0.1% is -
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Agniveer Vayu
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Achieve Indian Airforce Agniveer Vayu Physics Practice Book>Chapter 9 - Mechanical Properties of Solids>Exercise>Q 3
A wire Y=2×1011 N m-2 has length 1 m and area 1 mm2 . The work required to increase its length by 2 mm is
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Agniveer Vayu
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Achieve Indian Airforce Agniveer Vayu Physics Practice Book>Chapter 9 - Mechanical Properties of Solids>Exercise>Q 4
The volume change of a solid copper cube 10 cm on an edge, when subjected to a pressure of 7 MPa is
(Bulk modulus of copper=140 GPa)
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Agniveer Vayu
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Achieve Indian Airforce Agniveer Vayu Physics Practice Book>Chapter 9 - Mechanical Properties of Solids>Exercise>Q 5
If Young's modulus of iron is 2×1011 N m-2 and the inter-atomic spacing between two molecules is 3 ×10-10 m, then the interatomic force constant is