Class 11 Physics
Mechanical Properties of Solids
Question 1.
How do you define the term ‘stress’?
Question 2.
Describe Hooke’s law.
Question 3.
Formulize Hooke’s law according to the three types of stresses.
Question 4.
Why stress is not a vector quantity?
Question 5.
Compute the fractional change in volume of a glass slab, when subjected to a hydraulic pressure of 5 atm.
Question 6.
The edge of an aluminium cube is 15 cm long. One face of the cube is firmly fixed to a vertical wall. A mass of 300 kg is then attached to the opposite face of the cube. The shear modulus of aluminium is 25 GPa. What is the vertical deflection of this face?
Question 7.
A piece of copper having a rectangular cross-section of 10 mm × 12 mm is pulled in tension with 50,000 N force, producing only elastic deformation. Calculate the resulting strain?
Question 8.
A steel cable with a radius of 3.0 cm supports a chairlift at a ski area. If the maximum stress is not to exceed 1010 N-m–2, what is the maximum load the cable can support?
Question 9.
What is the density of water at a depth where pressure is 100.0 atm, given that its density at the surface is 1.03 × 103 kg-m–3?
Question 10.
How much should the pressure on a litre of water be changed to compress it by 0.20%?
Question 11.
What do you understand by the term ‘elasticity’? Explain with examples.
Question 12.
Which type of materials are known as “plastics”?
Question 13.
Define longitudinal strain.
Question 14.
What is shearing strain?
Question 15.
How do you define volume strain?
Question 16.
Define Young’s modulus and also give symbol for it.
Question 17.
A structural steel rod has a radius of 15 mm and a length of 1.5 m. A 250 kN force stretches it along its length. Calculate (a) stress, (b) elongation, and (c) strain on the rod. Young’s modulus, of structural steel is 2.0 × 1011 N-m-2.
Question 18.
What is bulk modulus and also give its symbol?
Question 19.
How do you define the term “compressibility”?
Question 20.
What is Poisson’s ration? Explain.
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All About Daily Practice Problems on Class 11 Physics Mechanical Properties of Solids NCERT Chapter 8
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