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A wire elongates by $2 mm$ when a load $W$ is hanged from it. If this wire goes over a pulley and two weights $W$ each are hung at the two ends then elongation in the wire will be

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Important Questions on Mechanical Properties of Solids

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Gamma Question Bank for Engineering Physics>Chapter 8 - Mechanical Properties of Solids>EXERCISE 8.1>Q 6

The force between two atoms can be represented by the potential energy

(U)

curve as shown in figure. For

r < r_{0}

and

r > r_{0}

, the forces between two atoms are respectively

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Gamma Question Bank for Engineering Physics>Chapter 8 - Mechanical Properties of Solids>EXERCISE 8.2>Q 7

1 cc

of water is taken from the surface to the bottom of a lake having depth

100 m

. If Bulk modulus of water is

2.2 \times 10^{9} N m^{- 2}

then decrease in the volume of the water will be

HARD

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Gamma Question Bank for Engineering Physics>Chapter 8 - Mechanical Properties of Solids>EXERCISE 8.2>Q 9

A uniform rod suffers a longitudinal strain of

2 \times 10^{- 3}

. The Poisson ratio of the material of the rod is

0.4

. The percentage change in volume is

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Gamma Question Bank for Engineering Physics>Chapter 8 - Mechanical Properties of Solids>EXERCISE 8.2>Q 10

The Poisson's ratio of a material is

0.5

. If a force is applied to a wire of this material, there is a decrease in the cross-sectional area by

4 %

. The percentage increase in the length is

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Gamma Question Bank for Engineering Physics>Chapter 8 - Mechanical Properties of Solids>EXERCISE 8.2>Q 11

If the Bulk modulus of lead is

8.0 \times 10^{9} N m^{- 2}

and the initial density of the lead is

11.4 g {cc}^{- 1}

, then under the pressure of

2.0 \times 10^{8} N m^{- 2}

, the density of the lead is

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Gamma Question Bank for Engineering Physics>Chapter 8 - Mechanical Properties of Solids>Assignment>Q 6

Two exactly similar wires of steel and copper are stretched by equal forces. If the total elongation is

2 cm,

then how much is the elongation in steel and copper wire respectively? Given,

Y_{steel} = 20 \times 10^{11} dyne {cm}^{- 2}, Y_{copper} = 12 \times 10^{11} dyne {cm}^{- 2} .

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Gamma Question Bank for Engineering Physics>Chapter 8 - Mechanical Properties of Solids>Assignment>Q 9

The load versus elongation graph for four wires of the same material is shown in figure. The thinnest wire is represented by line

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Gamma Question Bank for Engineering Physics>Chapter 8 - Mechanical Properties of Solids>Assignment>Q 11

One end of a wire of length

L

and weight

w

is attached rigidly to a point in roof and a weight

w_{1}

is suspended from its lower end. If

A

is the area of cross-section of the wire then the stress in the wire at a height

\frac{3 L}{4}

from its lower end is

A wire elongates by 2 mm when a load W is hanged from it. If this wire goes over a pulley and two weights W each are hung at the two ends then elongation in the wire will be

Important Questions on Mechanical Properties of Solids

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A wire elongates by $2 mm$ when a load $W$ is hanged from it. If this wire goes over a pulley and two weights $W$ each are hung at the two ends then elongation in the wire will be