Mechanical Prop...

Which one of the following statements is correct? In the case of

Identify the incorrect statement

A metalic rod of length 1 and cross-sectional area A is made of a material of Young modulus Y. If the rod is elongated by an amount y, then the work done is proportional to

The work done in stretching an elastic wire per unit volume is or strain energy in a stretched string is

Two wires of same diameter of the same material having the length 1 and 21. If the force F is applied on each, the ratio of the work done in the two wires will be

A 5 m long wire is fixed to the ceiling. A weight of 10 kg is hung at the lower end and is 1 m above the floor. The wire was elongated by 1 mm. The energy stored in the wire due to stretching is

If the forces constant of a wire is K, the work done in increasing the length of the wire by 1 is

An elastic material of Young\'s modulus Y is subjected to a stress S. The elastic energy stored per unit volume of the material is

A wire suspended vertically from one of its ends is stretched by attaching a weight of 200 N to the lower end. The weight stretches the wire by 1 mm. Then the elastic energy stored in the wire is

A brass rod of cross-sectional area 1 cm² and length 0.2 m is compressed lengthwise by a weight of 5 kg. If Young\'s modulus of elasticity of brass is 1 × 10¹¹ N/m² and g = 10 m/sec², then increase in the energy of the rod will be