Mechanical Properties of Solids: The Resistance to Deformation and their Strength

Stress, like pressure, is always perpendicular to a plane. True or False?

A wire with a radius of 5mm is hung freely from the ceiling. A load of 5N is applied to its free end. Find the elongation in the wire if its volume is 7.85*10-5m3 & young’s modulus is 1011N/m2.

A wire has a young’s modulus of 105N/m2, length 1m & radius 3mm. Assuming a uniform cross sectional area, find the radius of wire after it is under a force of 1N from both ends.

In a wire, when elongation is 2 cm energy stored is E. if it is stretched by 10 cm, then the energy stored will be

Two wires A and B are of the same length. The diameters are in the ratio 1 : 2 and the Youngs modulus are in ratio 2 : 1. if they are pulled by the same force, then their elongations will be in ratio

Longitudinal strain is possible in the case of

Two wires have the same material and length, but their masses are in the ration of 4 : 3. If they are stretched by the same force, their elongations will be in the ratio of

A rubber cord of cross sectional area 1 mm² and unstretched length 10 cm is stretched to 12 cm and then released to project a stone of mass 5 gram. If Y for rubber = 5 ? 108N/m², then the tension in the rubber cord is

If the length of a wire is reduced to half, then it can hold the

The Young’s modulus of a perfectly rigid body is

According to Hooke’s law of elasticity, if stress is increased, then the ratio of stress to strain

The restoring force per unit area is known as

In magnitude hydraulic stress is equal to

Stress in a solid body is defined as ___________ per unit area.

In the given system, masses are released from rest. The young’s modulus of wire is 1011N/m2, length = 1m & radius = 2mm. Find elongation in the wire when masses are moving. Assume pulley to be frictionless.