Stress and pressure are both forces per unit area. Then, in what respect does stress differ from pressure ?

Which type of strain is there, when a spiral spring is stretched by a force ?

What does the slope of stress versus strain graph indicate ?

What is Bulk modulud for a perfectly rigid body?

A wire 50cm long and 1 sq mm is cross-section has the Young's modulus, Y = 2 x 10¹⁰Nm^-2 . How much work is done in stretching the wire through 1 mm?

A life is tied with thick wires and its mass is 1000 kg. If the maximum acceleration of its 1.2ms^-2 and the maximum safe stress is 1.4 x 10⁸Nm^-2, then find the minimum diameter of the wire. Take g = 9.8 ms^-2

Figure  shows the strain-stress curve for a given material. What are (a) Young’s modulus and (b) approximate yield strength for this material?

How much should be pressure the a litre of water be changed to compress it by 0.10 %? Bulk modulus of elasticity of water = 2.2 x 10⁹ Nm^-2.

Anvils made of single crystals of diamond, with the shape as shown in figure are used to investigate the behaviour of materials under very high pressure. Flat faces at the narrow end of the anvil have a diameter of 0.50 mm and the wide en are subjected to a compressional force of 50000 N. What is the pressure at the tip of the anvil?

A uniform heavy rod of weight W, cross-sectional area A and length I is hanging from a fixed , support. Young's modulus of the material of the rod is Y. Neglecting the lateral contraction, find the elongation produced in the rod.

Read the following two statements below carefully and state, with reasons, if it is true or false.
(a) The Young’s modulus of rubber is greater than that of steel;
(b) The stretching of a coil is determined by its shear modulus.

A steel wire of length 4 m is stretched through 2 mm. The cross-section area of the wire is 2.0 mm². If Young's modulus of steel is 2.0 x 10¹¹ N/m², find
(i) the energy density of the wire and
(ii) the elastic potential energy stored in the wire.

Volumetric Strain in a Cube
Consider a solid cube which is subjected to a pressure of 6 x 10⁵ N/m². Due to this pressure, each side of the cube is shortened by 2 %. Find out the volumetric strain of the cube.

Foucault Pendulum
In a physics department, Forcault pendulum consists of a 130 kg steel ball which swings at the end of a 8.0 m long steel cable having the diameter of 3.0 mm. If the ball was first hung from the cable, then setermine how much did the cable stretch?

Construction for metro line was carried out day and night. One night, when work was in full swing suddenly chain of the crane, lifting a heavy concrete block, snapped and it fell done. Immediately, people from nearby area came for help. They lifted the concrete block and saved many lives. Injured were transferred to hospital without waiting for police to arrive.
What of locals helped in saving lives?alues p

What is the density of water at a depth where pressure is 80.0 atm, given that its density at the surface is 1.03 × 10³ kg m^–3?

A rod of length 1.05 m having negligible mass is supported at its ends by two wires of steel (wire A) and aluminium (wire B) of equal lengths as shown in figure. The cross-sectional areas of wires A and Bare 1.0 mm? and 2.0 mm², respectively. At what point along the rod should a mass m be suspended in order to produce (a) equal stresses and (b) equal strains in both steel and aluminium wires.

A load of 31.4 kg is suspended from a wire of radius 10^-3 m and density 9 x 10³ kg/m³. Calculate the change in temperature of the wire if 75% of the work done is converted into heat. The Young's modulus and the specific heat capacity of the material of the wire are 9.8 x 10¹⁰ N/m² and 490 J/kg/k respectively.