A rubber piece is wider than it is thick. When it is stretched in length by some amount :
Its thickness decreases but its width increases.
Its thickness decreases but its width remains constant.
Its thickness decreases but its width decreases
Both its thickness and width decreases.
One end of a uniform wire of length L and weight W is attached rigidly to a point in roof and a weight W1 is suspended from its lower end. If S is the area of corss-section of the wire, the stress in the wire at a height of 3L/4 from its lower end is :
The following for wires are made of the same material. Which of these will have the largest extension, when the same tension is applied ?
length = 50 cm, diameter = 0.5 mm
length = 100 cm, diameter = 1 mm
length = 200 cm, diameter = 2mm
length = 300 cm, diameter = 3 mm
If S is stress and Y is young's modulus of material of a wire, the energy stored in the wire per unit volume is :
2Y / S
S / 2Y
2 S2 Y
A substance breaks down by a stress of 106 N / m 2. If the density of the material of the wire is 3 X 103 kg / m 3, then the length of the wire of the substance which will break under its own weight when suspended vertically will be :
66.6 m
60.0 m
33.3 mm
30.3 mm
Energy stored in stretching a string per unit volume is :
X stress X strain
stress X strain
Y ( Strain)2
The compressibility of water is 4 X 10-5 per unit atmospheric pressure. The decrease in volume of 100 cm 3 of water under a pressure of 100 atmospheres will be :
0.4 cm3
4 X 10-5 cm 3
0.025 cm3
0.004 cm3
A wire of diameter 1 mm breaks under a tension of 1000 N. Another wire, of same material as that of the first one, but of diameter 2 mm breaks under a tension equal to:
500 N
100 N
1000 N
4000 N
Two wires are made of the same material and have the same volume. However wire 1 has cross- sectional area A and wire 2 has cross - sectional area 32 A. If the length of wire 1 increases by Δx on applying force F, how much force is needed to stretch wire 2 by the same amount ?
F
4 F
6 F
9 F
A cube is subjected ta uniform volume compression. If the side of the cube decreases by 2 %, Calculate the bulk strain ?
0.02
0.03
0.04
0.06