A bridge can bear 4 x 10⁴ kg weight. If the breaking stress is 47 x 10³ N/m³ and factor of safety is 5 then the area of cross section of the rod will be : 

The Poisson's ratio for a material is 0.1. If the longitudinal strain of a rod of this material is 1 x 10^-3, then the percentage change in the volume of rod will be :

The volume of a solid rubber ball when it is carried from the surface to the bottom of a 200 m deep lake decreases by 0.1%. The value for bulk modulus of elasticity for rubber will be :

The length of an iron wire is L and area of cross-section is A. The increase in length is l on applying the force F on its two ends. Which of the statement is correct ?

Two rods of different materials having coefficients of linear expansion α₁ and α₂ , Young's modulii Y₁ and Y₂ respectively are fixed between two rigid massive walls. The rods are heated such that they undergo the same increase in temperature. There is no bending of rods. If α₁ : α₂ =2 : 3, the thermal stresses developed in the two rods are equal provided Y₁ : Y₂ is equal to :

A uniform elastic plank moves due to a constant force F placed over a smooth surface. The area of end face is S and Young's modulus of the material is E. What is the average strain produced in the direction of the force?

The Young's modulus of a wire is Y. If the energy per unit volume is E, then the strain will be :

The magnitude of the force developed by raising the temperature from 0^oC to 100^oC of the iron bar 1.00 m long and 1 cm² cross-section when it is held so that it is not permitted to expand or bend is :

(Given : α = 10^-5 /^oC and Y = 10¹¹ N/m²)

For the same cross-sectional area and for a given load, the ratio of depressions for the beam of a square cross-section and circular cross-section is :

A metal block is experencing an atmospheric pressure of 10⁵ N/m². When the same block is placed in a vaccum chamber, the fractional change in its volume : (the bulk modulus of metal is 1.25 x 10¹¹ N/m²)