CBSE Class 11 Modulus of Elasticity Worksheet A

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1. State Hooke’s law?

2. What are ductile and brittle materials?

3. An elastic wire is cut to half its original length. How would it affect the maximum load that the wire can support?

4. Define modulus of elasticity and write its various types

5. Two different types of rubber are found to have the stress – strain curves as shown in the figure stress

i) In what ways do these curves suffer from the stress- strain curve of a metal wire?

2) Which of the two rubbers A and B would you prefer to be installed in the working of a heavy machinery

3) Which of these two rubbers would you choose for a car tyre?

6. Why is the force of repulsion responsible for the formation of a solid and not the forces of attraction?

7. A bar of cross section A is subjected to equal and opposite tensile force F at its ends. If there is a plane through the bar making an angle Q, with the plane at right angles to the bar in the figure

a) Find the tensile stress at this plane in terms of F, A and Q

b) What is the shearing stress at the plane in terms of F, and Q.

c) For what value of Q is tensile stress a maximum.

8. Which is more elastic rubber or steel? Explain.

9. The Young’s modulus of steel is 2.0x10⁺¹¹ w/m². If the interatomic spacing for the metal is 2.8x10^-10m, find the increase in the interatomic spacing for a force of 10⁹ N|m² and the force constant? 

Click on link below to download CBSE Class 11 Modulus of Elasticity Worksheet A.