NCERT Solutions for Class 11 Physics Chapter 9 Mechanical Properties of Solids
NCERT Solutions for Class 11 Physics Chapter 9 Mechanical Properties of Solids Topics and Subtopics in NCERT Solutions for Class 11 Physics Chapter 9 Mechanical Properties Of Solids : Section Name Topic Name 9 Mechanical Properties Of Solids 9.1 Introduction 9.2 Elastic behaviour of solids 9.3 Stress and strain 9.4 Hooke’s law 9.5 Stress-strain curve 9.6 Elastic moduli 9.7 Applications of elastic behaviour of materials QUESTIONS FROM TEXTBOOK Question 9. 1. A steel wire of length 4.7 m and cross-sectional area 3.0 x 10 -5 m 2 stretches by the same amount as a copper wire of length 3.5 m and cross-sectional area of 4.0 x 10 -5 m 2 under a given load. What is the ratio of the Young’s modulus of steel to that of copper? Answer: Question 9. 2. Figure shows the strain-stress curve for a given material. What are (a) Young’s modulus and (b) approximate yield strength for this material? Answer: (a) Young’s modulus of the material (Y) is given by Y =Stress/Strain =150 x 10 6 /0.002 150...