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KAMALA SUBRAMANIAM MATRIC HIGHER SECONDARY SCHOOL, Thanjavur, , Grade 11-Physics Question Bank, 4. WORK, ENERGY AND POWER, SHORT ANSWER QUESTIONS (BOOK BACK), 1. Explain how the definition of work in physics different from general perception., 2. Write the various types of potential energy. Explain the formulae, 3. Explain the characteristics of elastic and inelastic collision., 4. Define coefficient of restitution., 5. Define power. Give its unit., 6. State law of conservation of energy., 7. Define loss of kinetic energy in inelastic collision?, 8. Define work. Give its unit and dimension., 9. Can work done on an object become zero? Explain with example., 10. Write a note on positive work and negative work., 11. Define Energy., 12. List the various units for energy and give their equivalent SI values., 13. Define kinetic energy (KE)., 14. Define potential energy (U)., 15. Define work - energy theorem., 16. Give the relation between momentum and kinetic energy., 17. Define gravitational potential energy., 18. Define elastic potential energy., 19. Define electrostatic potential energy., 20. Define one watt (1 W), 21. Define kilo watt hour., 22. What is called collisions, Give its types., 23. Define elastic collision., 24. Define Inelastic collision., 25. Define perfectly inelastic collision., , LONG ANSWER QUESTIONS (5 Marks), 1. State and Explain the Work – Kinetic energy theorem?, 2. Derive the expression for relation between power and velocity?, 3. Explain elastic collision in one dimension?, 4. Explain of perfectly inelastic collision?, 5. Explain conservation of linear momentum in collision process?, , 5. MOTION OF SYSTEM OF PARTICLES AND RIGID BODIES, SHORT ANSWER QUESTIONS (BOOK BACK), 1. Define centre of mass., 2. Define torque and mention its unit., 3. Give any two examples of torque in day-to-day life., 4. What is the relation between torque and angular momentum?, 5. Define mechanical equilibrium of a rigid body., 6. How do you distinguish between stable and unstable equilibrium?, 7. Define couple. Give examples for couple., 8. Define moment of couple., 9. Define centre of gravity., 10. What is the significance of moment of inertia?, 11 - Standard Physics, , V.M.Sureshkannan.,M.Sc.,M.Phil.,B.Ed, Physics

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KAMALA SUBRAMANIAM MATRIC HIGHER SECONDARY SCHOOL, Thanjavur, , Grade 11-Physics Question Bank, 11. Define radius of gyration., 12. What is the importance of conservation of angular momentum?, 13. What are the rotational equivalents for the physical quantities, (i) mass and (ii) force?, 14. What is the condition for pure rolling?, 15. What is the difference between sliding and slipping?, 16. What is a rigid body?, 17. What is called moment of force? Give an example., 18. Why torque is called as pseudo vector?, 19. Define angular momentum., 20. Give the conditions for angular momentum to be zero., 21. Define conservation of angular momentum., 22. Define mechanical advantage of simple lever., 23. How will you determine centre of gravity of uniform lamina of irregular shape., 24. Define moment of inertia., 25. Give the relation between rotational kinetic energy and angular momentum., 26. Define power delivered by the torque., 27. Define Rolling motion., , LONG ANSWER QUESTIONS (5 Marks), 1. Derive the relation between torque and angular acceleration?, 2. Derive the relation between angular momentum and angular velocity?, 3. Obtain the reason for bending of cyclist in curves?, 4. Explain the principle of moments?, 5. Explain the rolling on inclined plane without slipping?, 6. Explain the moment of inertia of a uniform rod about a perpendicular axis passing through, its centre of mass?, 7. Obtain an expression for kinetic energy in rotation?, 8. Explain the kinetic energy in pure rolling (without slipping)?, , 6. GRAVITATION, SHORT ANSWER QUESTIONS (BOOK BACK), 1. State Newton‟s Universal law of gravitation., 2. Will the angular momentum of a planet be conserved? Justify your answer., 3. Define the gravitational field. Give its unit., 4. What is meant by superposition of gravitational field?, 5. Define gravitational potential energy., 6. Define gravitational potential., 7. What is meant by escape speed in the case of the Earth?, 8. Why is the energy of a satellite (or any other planet) negative?, 9. What are geostationary and polar satellites?, 10. Define weight, 11. Define orbital velocity of a satellite., 12. Write a note on weightlessness?, 13. The astronauts in space ships experience weightlessness. Why?, [, , 11 - Standard Physics, , V.M.Sureshkannan.,M.Sc.,M.Phil.,B.Ed, Physics

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KAMALA SUBRAMANIAM MATRIC HIGHER SECONDARY SCHOOL, Thanjavur, , Grade 11-Physics Question Bank, , LONG ANSWER QUESTIONS (5 Marks), 1. How Newton obtain Gravitational law from Kepler‟s law?, 2. Derive an expression for gravitational potential energy?, 3. Prove that at points near the surface of the Earth, the gravitational potential energy of the, object is U = mgh?, 4. Explain the variation of “g” with altitude?, 5. Explain the variation of “g” with depth?, 6. Explain the variation of “g” with latitude, 9. Derive an expression for escape speed?, 10. Derive an expression for orbital speed?, 11. Derive the time period of satellite orbiting the Earth., 12. Derive an expression for Energy of the satellite?, 13. Explain in detail the Geo -stationary satellite and Polar satellite?, 14. Discuss the apparent weight of man standing inside the elevators?, 15. Explain in detail the idea of weightlessness using lift as an example?, , 11 - Standard Physics, , V.M.Sureshkannan.,M.Sc.,M.Phil.,B.Ed, Physics