This quiz works best with JavaScript enabled. Home > Cbse > Class 11 > Science > Physics Part I > Class 11 Physics (Part I) Chapter 4 Work – Quiz 20 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Class 11 Physics (Part I) Chapter 4 Work Quiz 20 (60 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. When an object is raised to a certain height, what happens to its potential energy? A) It remains constant. B) It increases. C) It depends on the mass of the object. D) It decreases. Show Answer Correct Answer: B) It increases. 2. To complete a project 200, 000 Joules of work are needed. The time taken to coplete the project is 20 seconds. What number goes with w? A) W=10, 000 Joules. B) W=200, 000 Joules. C) W=10 Watts. D) W=20 seconds. Show Answer Correct Answer: B) W=200, 000 Joules. 3. The rate of energy transfer is equivalent to: A) Power. B) Work. C) Force. D) Distance. Show Answer Correct Answer: A) Power. 4. What is the significance of the Work-Energy Theorem in physics? A) It outlines the principles of quantum mechanics. B) It explains the conservation of mass in chemical reactions. C) It describes the relationship between temperature and pressure. D) The Work-Energy Theorem is significant because it connects work and energy, allowing for easier analysis of motion and forces. Show Answer Correct Answer: D) The Work-Energy Theorem is significant because it connects work and energy, allowing for easier analysis of motion and forces. 5. What is the product of force and displacement called? A) Momentum. B) Energy. C) Work. D) Power. Show Answer Correct Answer: C) Work. 6. An object of mass 1 kg is dropped from a top of a tower. How will the graph its mechanical energy vs height from the ground look like? A) Straight line parallel to X axis. B) Straight line with positive slope. C) Straight line with negative slope. D) Increasing curve. Show Answer Correct Answer: A) Straight line parallel to X axis. 7. What type of energy is stored in an object due to its position? A) Potential Energy. B) Kinetic Energy. C) Electric Potential Energy. D) Mechanical Energy. Show Answer Correct Answer: A) Potential Energy. 8. In case of negative work done, the angle between the force and displacement is: A) 90$^{o}$. B) 0$^{o}$. C) 180$^{o}$. D) 60$^{o}$. Show Answer Correct Answer: C) 180$^{o}$. 9. What unit is work measured in? A) Watt (W). B) Joule (J). C) Kilogram (kg). D) Newton (N). Show Answer Correct Answer: B) Joule (J). 10. A moving car has kinetic energy and speeds up until it's going 4 times as fast. It has ..... times more kinetic energy. A) 5. B) 3. C) 4. D) 2. Show Answer Correct Answer: C) 4. 11. What is the unit of work in the International System of Units? A) Watt. B) Joule. C) Pascal. D) Newton. Show Answer Correct Answer: B) Joule. 12. If a work done by a crane is 1000 J to lift up a load in 2 minutes.Calculate the power of the crane. A) 500 W. B) 8.33 W. C) All the above. D) None of the above. Show Answer Correct Answer: B) 8.33 W. 13. Which scenario describes work being done? A) Holding a heavy box stationary. B) Pushing against a locked door. C) Pulling a wagon downhill. D) Carrying a backpack while standing still. Show Answer Correct Answer: C) Pulling a wagon downhill. 14. What two factors affect an object's potential energy? A) Area and volume. B) Area and height. C) Mass and height. D) Mass and velocity. Show Answer Correct Answer: C) Mass and height. 15. What is the total energy of a mass of 1.5 kg on a table 100 cm high? A) 1.5 J. B) 1 500 J. C) 150 J. D) 15 J. Show Answer Correct Answer: D) 15 J. 16. A toy baby carriage is sitting at the top of a hill that is 21 m high. The carriage with the baby has a mass of 200 grams. How much potential energy does the baby carriage+ baby system have? A) 42 J. B) 42000 J. C) .42 J. D) 4.2 J. Show Answer Correct Answer: A) 42 J. 17. A ball is dropped on to the ground from a height 1m, The Coefficient of restitution is 0.6 To what height will the ball rebound A) 0.66m. B) 0.36m. C) 0.24m. D) 0.44m. Show Answer Correct Answer: B) 0.36m. 18. Potential or kinetic?Stretched bow and arrow? A) Kinetic. B) Potential. C) All the above. D) None of the above. Show Answer Correct Answer: B) Potential. 19. A crane takes 2.0 minutes to lift a load to the top of a building. The change in gravitational potential energy of the load is 360 kJ. What is the useful power output of the crane? A) 720 kW. B) 43200 kW. C) 180 kW. D) 3.0 kW. Show Answer Correct Answer: D) 3.0 kW. 20. On a roller coaster, where is maximum kinetic energy? A) At the top of a big hill. B) When going upside down. C) When going around a corner. D) At the bottom of a big hill. Show Answer Correct Answer: D) At the bottom of a big hill. 21. A bowling ball with 1200 J of gravitational potential energy falls and ends on the ground. What is the work done? A) 0 J. B) -1200 J. C) -600 J. D) +1200 J. Show Answer Correct Answer: B) -1200 J. 22. Near the end of the shockwave ride, a braking system exerts an applied force upon the coaster car to bring it to a stop. Determine the work of the indicated force. A) Negative Work. B) Positive Work. C) Maximum Work. D) No Work. Show Answer Correct Answer: A) Negative Work. 23. Two bodies of masses m$_{1}$ and m$_{2}$ are moving with velocities v$_{1}$ and v$_{2}$ respectively. The ratio of their kinetic energies is given by: A) M$_{1}$v$_{1}$:m$_{2}$v$_{2}$. B) M$_{1}$v$_{1}$$^{2}$:m$_{2}$v$_{2}$$^{2}$. C) M$_{1}$v$_{2}$:m$_{2}$v$_{1}$. D) M$_{1}$$^{2}$v$_{1}$:m$_{2}$$^{2}$v$_{2}$. Show Answer Correct Answer: B) M$_{1}$v$_{1}$$^{2}$:m$_{2}$v$_{2}$$^{2}$. 24. A boy produces an average power output of 60 W as he rides his bicycle for 2.0 minutes. How much useful energy does he expend? A) 30 J. B) 7200 J. C) 120 J. D) 0.50 J. Show Answer Correct Answer: B) 7200 J. 25. What is required for 'work' to be considered as being done? A) Force must be applied in any direction. B) Movement in the same direction as the force. C) Force must be applied without movement. D) Movement in the direction opposite to the force. Show Answer Correct Answer: B) Movement in the same direction as the force. 26. One advantage to wind power is: A) Coasts that have a lot of wind are expensive. B) Birds can get hurt in the tower. C) Sometimes there is no wind. D) Wind is free. Show Answer Correct Answer: D) Wind is free. 27. How high up is a 3200-kg plane if it has 960000 J of potential energy? A) 300 m. B) 10 m. C) 30 m. D) 307200000 m. Show Answer Correct Answer: C) 30 m. 28. In order for Work to happen, what 2 things must occur? A) Mass and Displacement. B) Force and Mass. C) Force and Work. D) Force and displacement. Show Answer Correct Answer: D) Force and displacement. 29. A worker carrying a box of mass 20 kg to a height of 2.5m. Calculate the work done by the worker in carrying the box. A) 490.5J. B) 1000J. C) 4950J. D) 49.05J. Show Answer Correct Answer: A) 490.5J. 30. This is a rate of doing work. A) Work. B) Joules. C) Energy. D) Power. Show Answer Correct Answer: D) Power. 31. If a machine does 200 J of work in 4 seconds, what is its power rating? A) 75 W. B) 100 W. C) 25 W. D) 50 W. Show Answer Correct Answer: D) 50 W. 32. A 500 N force is applied to lift a 100 kg object vertically upwards. How much work is done if the object is raised 5 meters? A) 50 J. B) 5000 J. C) 10, 000 J. D) 2500 J. Show Answer Correct Answer: D) 2500 J. 33. A 2 kg object is moving at a speed of 10 m/s and comes to rest in 5 seconds due to a constant retarding force. The work done by the force is: A) 100 J. B) -200 J. C) 0 J. D) -100 J. Show Answer Correct Answer: B) -200 J. 34. The work done on a body of mass 20 kg moving in a circular path is: A) 10 J. B) 200 J. C) 20 J. D) 0 J. Show Answer Correct Answer: D) 0 J. 35. A robotic arm lifts a stack of cafeteria trays weighing 62 newtons (N). It moves the trays 2 meters (m). How much work has the robotic arm performed? A) 186 J. B) 124 J. C) 31 J. D) 64 J. Show Answer Correct Answer: B) 124 J. 36. What factors determine the potential energy of an object? A) Color, shape, and size of the object. B) Temperature, pressure, and volume. C) Speed, direction, and mass of the object. D) Mass, height above a reference point, and gravitational acceleration. Show Answer Correct Answer: D) Mass, height above a reference point, and gravitational acceleration. 37. What does the term "Power" mean in physics? A) It's the rate at which work is done or energy is transferred. B) It's the speed of an object in motion. C) It's the force of gravity on an object. D) It's a measurement of strentgh. Show Answer Correct Answer: A) It's the rate at which work is done or energy is transferred. 38. The unit of power in SI unit is equivalent to A) Kg ms$^{-2}$. B) Kg m$^{2}$s$^{-2}$. C) Kg m$^{2}$s$^{-3}$. D) None of above. Show Answer Correct Answer: C) Kg m$^{2}$s$^{-3}$. 39. What is an example of Kinetic energy? A) Laying down in bed. B) A football being thrown downfield. C) Setting a book on the counter. D) Sitting in your desk. Show Answer Correct Answer: B) A football being thrown downfield. 40. How much work you do in a certain amount of time is called ..... A) Force. B) Power. C) Energy. D) Work. Show Answer Correct Answer: B) Power. 41. Energy that is stored in bonds between atoms is: A) Nuclear energy. B) Chemical energy. C) Mechanical energy. D) Kinetic energy. Show Answer Correct Answer: B) Chemical energy. 42. A bird is flying with 1200 J of gravitational potential energy and 600 J of kinetic energy. What is the total mechanical energy of the bird? A) 600 J. B) 0 J. C) 1800 J. D) 1200 J. Show Answer Correct Answer: C) 1800 J. 43. Which example involves transferring energy from one object to another? A) A bowler releasing a bowling ball. B) A fan blowing air. C) A parked car. D) A person sitting on a chair. Show Answer Correct Answer: A) A bowler releasing a bowling ball. 44. A boy pushes on a parked car with a force of 250N. The car does not move. How much work does the boy do? A) 0J. B) 250J. C) 2500J. D) 250N. Show Answer Correct Answer: A) 0J. 45. If 68 Joules were necessary to move a 4 Newton crate, how far was the crate moved? A) 272 cm. B) 272 m. C) 17 m. D) 4.05 m. Show Answer Correct Answer: C) 17 m. 46. If a conveyor belt uses 10 J to move a piece of candy a distance of 3 m in 20s, what is the conveyor belt's power? A) 67 W. B) 0.5 J. C) 0.5 W. D) 1.5 W. Show Answer Correct Answer: C) 0.5 W. 47. Most renewable energy is derived directly or indirectly from the sun. A) True. B) False. C) All the above. D) None of the above. Show Answer Correct Answer: A) True. 48. What happens to the total mechanical energy in a closed system with only conservative forces? A) It increases. B) It decreases. C) It remains constant. D) It becomes zero. Show Answer Correct Answer: C) It remains constant. 49. Energy of a rock perched on a cliff is an example of ..... A) Chemical. B) Elastic. C) Kinetic. D) Gravitational. Show Answer Correct Answer: D) Gravitational. 50. In an inelastic collision, the final kinetic energy is always less then the initial kinetic energy of the system. A) True. B) False. C) All the above. D) None of the above. Show Answer Correct Answer: A) True. 51. If a force of 100 N is applied to move a box 4 meters across a floor, how much work is done on the box? A) 25 J. B) 104 J. C) 400 J. D) 500 J. Show Answer Correct Answer: C) 400 J. 52. Kinetic energy increase if mass increases A) True. B) False. C) All the above. D) None of the above. Show Answer Correct Answer: A) True. 53. An object of mass 2.4 kg is kept on a level surface. On applying a force of 50 N, the object moves 8 m in the direction of the force. Calculate the quantity of work done. A) 100J. B) 50J. C) 400J. D) 200J. Show Answer Correct Answer: C) 400J. 54. What determines the amount of work done? A) Only the force applied. B) Only the distance moved. C) Both force and distance. D) Only the time taken. Show Answer Correct Answer: C) Both force and distance. 55. The law of conservation states that A) Every action has an equal and opposite reaction. B) All matter has thermal energy. C) Energy cannot be created or destroyed, only changes form. D) Heat moves from an object of higher temperature to an object of lower temperature. Show Answer Correct Answer: C) Energy cannot be created or destroyed, only changes form. 56. A weight lifter jerks 220 kg vertically through 1.5 meters and holds still at that height for two minutes. The works done by him in lifting and in holding it still are respectively A) 0, 3234 J. B) 2334 J, 10 J. C) 220J, 330J. D) 3234 J, 0. Show Answer Correct Answer: D) 3234 J, 0. 57. The impulse experienced by an object is equivalent to its change in ..... A) Kinetic energy. B) Velocity. C) Momentum. D) Displacement. Show Answer Correct Answer: C) Momentum. 58. Principle of Conservation of Energy states that energy A) Energy cannot be transferred from one form to another. B) Cannot be created or destroyed. C) Is created from motion. D) Can only be converted into heat. Show Answer Correct Answer: B) Cannot be created or destroyed. 59. Why does a boy do no work when holding a heavy bag without moving? A) The bag has no energy. B) The bag is too heavy. C) There is no movement. D) He is too tired. Show Answer Correct Answer: C) There is no movement. 60. What does potential energy depend on? A) Time and work. B) Force and distance. C) Mass and height. D) Mass and velocity. Show Answer Correct Answer: C) Mass and height. ← PreviousNext →Related QuizzesScience QuizzesClass 11 QuizzesClass 11 Physics (Part I) Chapter 4 Work Quiz 1Class 11 Physics (Part I) Chapter 4 Work Quiz 2Class 11 Physics (Part I) Chapter 4 Work Quiz 3Class 11 Physics (Part I) Chapter 4 Work Quiz 4Class 11 Physics (Part I) Chapter 4 Work Quiz 5Class 11 Physics (Part I) Chapter 4 Work Quiz 6Class 11 Physics (Part I) Chapter 4 Work Quiz 7Class 11 Physics (Part I) Chapter 4 Work Quiz 8 🏠 Back to Homepage 📘 Download PDF Books 📕 Premium PDF Books