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11th CBSE
IMPORTANT
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 The Young's modulus for steel is much more than that for rubber. For the same longitudinal strain, which one will have greater tensile stress?

Important Questions on Mechanical Properties of Solids

EASY
11th CBSE
IMPORTANT
NCERT Exemplar Physics - Class 11>Chapter 9 - Mechanical Properties of Solids>VSA>Q 9.15
Is stress a vector quantity?
HARD
11th CBSE
IMPORTANT
NCERT Exemplar Physics - Class 11>Chapter 9 - Mechanical Properties of Solids>VSA>Q 9.16
 Identical springs of steel and copper are equally stretched. On which, more work will have to be done?
EASY
11th CBSE
IMPORTANT
NCERT Exemplar Physics - Class 11>Chapter 9 - Mechanical Properties of Solids>VSA>Q 9.17
What is the Young's modulus for a perfect rigid body?
MEDIUM
11th CBSE
IMPORTANT
NCERT Exemplar Physics - Class 11>Chapter 9 - Mechanical Properties of Solids>VSA>Q 9.18
What is the Bulk modulus for a perfect rigid body?
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11th CBSE
IMPORTANT
NCERT Exemplar Physics - Class 11>Chapter 9 - Mechanical Properties of Solids>SA>Q 9.19
 A wire of length L and radius r is clamped rigidly at one end. When the other end of the wire is pulled by a force f, its length increases by l. Another wire of the same material of length 2 L and radius 2 r, is pulled by a force 2f. Find the increase in length of this wire.
HARD
11th CBSE
IMPORTANT
NCERT Exemplar Physics - Class 11>Chapter 9 - Mechanical Properties of Solids>SA>Q 9.20
 A steel rod (Y=2×1011Nm-2; and a=10-5  C-10) of length 1 m and area of cross.section 1 cm2 is heated from 0°C to 200°C,  without being allowed to extend or bend. What is the tension produced in the rod?
HARD
11th CBSE
IMPORTANT
NCERT Exemplar Physics - Class 11>Chapter 9 - Mechanical Properties of Solids>SA>Q 9.21
To what depth must a rubber ball be taken in deep sea so that its volume is decreased by 0.1%. (The bulk modulus of rubber is 9.8×108 Nm-2, and the density of sea water is 103 kg m-3.)
MEDIUM
11th CBSE
IMPORTANT
NCERT Exemplar Physics - Class 11>Chapter 9 - Mechanical Properties of Solids>SA>Q 9.22
 A truck is pulling a car out of a ditch by means of a steel cable that is 9.1m  long and has a radius of 5mm. When the car just begins to move, the tension in the cable is 800 N. How much has the cable stretched? (Young's modulus for steel is 2×1011 N. m-2)