1. Define stress Define strain 3. Which is more elastic, rubber or steel and why? 4. What is elastic limit and plastic limit? 5. Define elastic body and plastic body. 6. What are the three modulii of elasticity? 7. Define (i) linear strain (ii) bulk strain and (iii) shearing strain. 8. Write the statement of Hooke's law. 9. Define Modulus of elasticity 10. Define (i) Young's modulus (ii) Bulk modulus and (iii) Rigidity modulus. 11. Define Poisson's ratio. 12. What is uniform bending of a beam? 13. What is non uniform bending of a beam? 14. Define coefficient of viscosity. 15. Derive the dimensional formula and the SI unit for the coefficient of viscosity. 16. What is stream line motion? 17. What is turbulent motion? 18. What is Reynolds number? 19. What is critical velocity? 20. What is terminal velocity? 21. Write the application of viscosity. 22. Derive the S.I. unit and the dimensional formula of surface tension. 23. What is the effect of surface tension on the surface area of liquids? 24. The droplet of rain is spherical. Why? 25. How do insects run on the surface of water? 26. Define surface tension of a liquid. 27. Define angle of contact. 28. Write any two applications of capillarity. 29. What are uniform bending of beams. 30. What are non-uniform bending of beams 31. Explain young's modulus 32. Explain Bulk modulus 33. Explain Rigidity modulus