This quiz works best with JavaScript enabled. Home > Cbse > Class 11 > Science > Physics Part I > Class 11 Physics (Part I) Chapter 4 Work – Quiz 17 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Class 11 Physics (Part I) Chapter 4 Work Quiz 17 (60 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. A softball player slows to a stop while diving into third base. Is this an example of positive, negative or zero being done on the player? Is this an example of positive, negative, or zero work being done on the player? A) Positive. B) Negative. C) Zero. D) None of the above. Show Answer Correct Answer: B) Negative. 2. Energy is measured in the same units as A) Power. B) Force. C) Work. D) None of the above. Show Answer Correct Answer: C) Work. 3. State the work-energy theorem in your own words. A) The work done on an object equals the change in its kinetic energy. B) The work done on an object is equal to its mass times velocity. C) Work is the only factor affecting an object's speed. D) Kinetic energy is always constant regardless of work done. Show Answer Correct Answer: A) The work done on an object equals the change in its kinetic energy. 4. What percent energy is wasted by a machine if the energy input is 262 J and the energy output is 131 J? A) 5%. B) 50%. C) 100 J. D) None of the above. Show Answer Correct Answer: B) 50%. 5. What has to happen when a force is exerted on an object for work to be done? A) The object moves. B) The object stays still. C) The object is heavy. D) None of these. Show Answer Correct Answer: A) The object moves. 6. A bomb at rest and of 10 Kg explodes into two pieces of masses 6 kg and 4 kg respectively. The mass of 4 kg moves with the velocity of 12 m/s. The velocity of the other mass will be A) 4 m/s. B) 8 m/s. C) 12 m/s. D) 2 m/s. Show Answer Correct Answer: B) 8 m/s. 7. Which law states that energy can be transformed, but cannot be created or destroyed? A) Law of conservation of matter. B) Newton's 3rd Law. C) Law of conservation of energy. D) Newton's 1st Law. Show Answer Correct Answer: C) Law of conservation of energy. 8. If a 5 kg object is lifted to a height of 10 metres, what is its gravitational potential energy? (Assume $g = 9.8 \, \text{m/s}^2$ A) 980 Joules. B) 490 Joules. C) 98 Joules. D) 49 Joules. Show Answer Correct Answer: B) 490 Joules. 9. The mass of a simple pendulum bob is 100 gm. The length of the pendulum is 1 m. The bob is drawn aside from the equilibrium position so that the string makes an angle of 60$^\circ$ with the vertical and let go. The kinetic energy of the bob while crossing its equilibrium position will be A) 0.94 J. B) 1.2 J. C) 1 J. D) 0.49 J. Show Answer Correct Answer: D) 0.49 J. 10. A uniform chain is held on a frictionless table with half of its length hanging over the edge. If the chain has a mass 'm' and length 'L', how much work is required to pull the hanging part back onto the table? A) MgL/4. B) MgL/8. C) MgL/2. D) MgL/16. Show Answer Correct Answer: B) MgL/8. 11. If you push a coffee mug 1.4 m using a force of 5 N, the work done on the mug is? A) 8 J. B) 9 J. C) 6 J. D) 7 J. Show Answer Correct Answer: D) 7 J. 12. The unit of power is the ..... A) Work. B) Watt. C) All the above. D) None of the above. Show Answer Correct Answer: B) Watt. 13. Which of the following activities is considered to do work in scientific terms? A) Sitting and reading a book. B) Lifting a box off the ground. C) Pushing a stationary wall. D) Holding a heavy object still. Show Answer Correct Answer: B) Lifting a box off the ground. 14. A rain drop of mass (1/10) gram falls vertically at constant speed under the influence of the forces of gravity and viscous drag. In falling through 100 m, the work done by gravity is A) 9.8 J. B) 98 J. C) 0.98 J. D) 0.098J. Show Answer Correct Answer: D) 0.098J. 15. Mrs. Steward carries a 50 N cat 10 m across a room. Her arms exert an upward force on the cat equal to its weight. How much work is Mrs. Steward doing on the cat? A) 500 N. B) 50 N. C) 5 N. D) 0 N. E) None of the above. Show Answer Correct Answer: D) 0 N. 16. What is the kinetic energy of a 4 kg rock falling through the air at 5 m/s? A) 20 J. B) 10 J. C) 50 J. D) 200 J. Show Answer Correct Answer: C) 50 J. 17. The unit of energy is A) Newton. B) Kg. C) Watt. D) Joule. Show Answer Correct Answer: D) Joule. 18. Which of the following are required in order to have power? A) Constant height. B) A change in mass. C) Work. D) Constant speed or velocity. Show Answer Correct Answer: C) Work. 19. The force-extension graph for a spring is shown. What represents the work done to extend the spring? A) Twice the area under the graph. B) The gradient of the graph. C) The reciprocal of the gradient of the graph. D) The area under the graph. Show Answer Correct Answer: D) The area under the graph. 20. If you do 200 J of work in 10 seconds, your power output is ..... A) 2000 W. B) 20 W. C) 200 W. D) 2 W. Show Answer Correct Answer: B) 20 W. 21. For perfectly elastic body coefficient of restitution is A) Zero. B) 1. C) More than 1. D) Less than 1. Show Answer Correct Answer: B) 1. 22. What is the formula for Power? A) E=mc$^{2}$. B) W= F x d. C) P = W/T. D) None of the above. Show Answer Correct Answer: C) P = W/T. 23. The unit of work, joule, is dimensionally the same as ..... A) Newton-meter. B) Newton/kilogram. C) Newton/second. D) Newton-second. Show Answer Correct Answer: A) Newton-meter. 24. What are the units of work? A) Newtons. B) Watts. C) Joules. D) None of the above. Show Answer Correct Answer: C) Joules. 25. What is the unit of measurement for kinetic energy A) Kilogram. B) Joule. C) Newton. D) Watt. Show Answer Correct Answer: B) Joule. 26. Two cars with different power ratings accelerating to the same speed: A) Cover different distances. B) Apply different amounts of total force. C) Take different amounts of time. D) Use different amounts of total energy. Show Answer Correct Answer: C) Take different amounts of time. 27. I swing a ball around my head at constant speed in a circle with circumference 3 m. What is the work done on the ball by the 10 N tension force in the string during one revolution of the ball? Hint:What is the angle between Force and Displacement? A) 20 J. B) 30 J. C) 10 J. D) 0 J. Show Answer Correct Answer: D) 0 J. 28. Calculate the average speed that a motor rated 200W raises a 40kg load A) 2m/s. B) 0.2m/s. C) 5m/s. D) 0.5m/s. Show Answer Correct Answer: D) 0.5m/s. 29. If the momentum of an object is doubled then the kinetic energy will increase by A) Five times. B) Four times. C) Twice. D) Three times. Show Answer Correct Answer: B) Four times. 30. On a force versus stretch graph, the area under the curve is a representation of: A) PE. B) SPE. C) KE. D) Force. E) Position. Show Answer Correct Answer: B) SPE. 31. If the mass and velocity of a body is doubled, how does the kinetic energy of the body change? A) 2 times. B) Same. C) 4 times. D) 8 times. Show Answer Correct Answer: D) 8 times. 32. A boy raises a box with a weight of 120N from a height of 2m. The work done by him is ..... A) 120J. B) 60J. C) 240J. D) 130j. Show Answer Correct Answer: C) 240J. 33. What must happen for work to be done according to physics? A) An object must move in any direction. B) An object must be lifted off the ground. C) An object must move in the direction of the applied force. D) An object must remain stationary. Show Answer Correct Answer: C) An object must move in the direction of the applied force. 34. Objects in motion have ..... energy. A) Sound. B) Thermal. C) Mechanical. D) Electrical. Show Answer Correct Answer: C) Mechanical. 35. A crane carries a 500 N load to a height of 10 m in 2 minutes. What is the power generated by the crane? A) 417 W. B) 4171 W. C) 41.7 W. D) 41700 W. Show Answer Correct Answer: C) 41.7 W. 36. In which of these cases is work being done? A) A student pushes a locked door that does not move. B) A student sits on the carpet. C) A student sleeps. D) A student carries his chair into another room. Show Answer Correct Answer: D) A student carries his chair into another room. 37. This type of energy requires that the object is in motion ..... A) Kinetic Energy. B) Chemical Energy. C) Gravitational Potential Energy. D) Elastic Potential Energy. Show Answer Correct Answer: A) Kinetic Energy. 38. How does work relate to energy transfer? A) Work is the transfer of energy through force and movement. B) Work is only related to heat transfer. C) Work is the same as energy. D) Energy can exist without work. Show Answer Correct Answer: A) Work is the transfer of energy through force and movement. 39. If you push an object a given distance, while applying four times the force, you do ..... A) Twice as much work. B) The same amount of work. C) Four times as much work. D) Half as much work. Show Answer Correct Answer: C) Four times as much work. 40. If you do work on an object in one third of the usual time, your power output is ..... A) Three times the usual power output. B) Impossible to predict. C) One third of the usual power output. D) The same as the usual power output. Show Answer Correct Answer: A) Three times the usual power output. 41. What is the formula for calculating power? A) P = W / t. B) P = E / v. C) P = F * d. D) P = m * a. Show Answer Correct Answer: A) P = W / t. 42. All of the following are an example of thermal energy except for: A) Pencil. B) Stove. C) Heater. D) Fire. Show Answer Correct Answer: A) Pencil. 43. True or False:Fossil Fuels provide 95% of our world's energy demands. A) True. B) False. C) All the above. D) None of the above. Show Answer Correct Answer: A) True. 44. The equation for POWER is A) Power = work x time. B) Power = time / work. C) Power = mass x time. D) Power = work / time. Show Answer Correct Answer: D) Power = work / time. 45. If 360 Joules of work are needed to move a crate a distance of 4 meters in 5 sec, what is the power used? A) 60 W. B) 36 W. C) 72 W. D) 144 W. Show Answer Correct Answer: C) 72 W. 46. What is the significance of Joules in physics? A) It measures velocity. B) It measures work and energy. C) It measures power. D) It measures force. Show Answer Correct Answer: B) It measures work and energy. 47. What are the units of measurements of power? A) W (Watts). B) Horsepower. C) J (Joules). D) N (Newtons). Show Answer Correct Answer: A) W (Watts). 48. S.I unit of energy is A) A. Watt. B) B. Kilowatt. C) C. Joule. D) None of the above. Show Answer Correct Answer: C) C. Joule. 49. The gravitational potential energy of an object is at its maximum when: A) The object is at rest. B) The object is in motion. C) The object is at the highest point. D) The object is at the lowest point. Show Answer Correct Answer: C) The object is at the highest point. 50. What is energy of motion? A) Light energy. B) Kinetic energy. C) Electrical energy. D) Potential energy. Show Answer Correct Answer: B) Kinetic energy. 51. Which of these is a renewable energy source? A) Oil. B) Coal. C) Natural gas. D) Solar energy. Show Answer Correct Answer: D) Solar energy. 52. As the velocity of an object decreases its KE will ..... A) Increase. B) Decrease. C) Stay the same. D) None of the above. Show Answer Correct Answer: B) Decrease. 53. A long jumper with a mass of 60 kg approaches the take-off board with a velocity of 11m.s-1. What is their linear kinetic energy? A) 1045.4 J. B) 3630 J. C) 3330 J. D) 1047.2 J. Show Answer Correct Answer: B) 3630 J. 54. In a factory four bulbs of 100 W each and five fans of 110 W each operate for 12 hours daily. Calculate the units of electricity consumed? A) 15.5 units. B) 9 units. C) 12.2 units. D) 11.4 units. Show Answer Correct Answer: D) 11.4 units. 55. Hector carries his Playstation 5 to his car. Is this positive work, negative work or no work? A) No Work. B) Positive Work. C) Negative Work. D) Can Not be determined. Show Answer Correct Answer: A) No Work. 56. What is the work done when a force of 0 N acts on an object? A) Infinite work. B) Zero work. C) Negative work. D) Positive work. Show Answer Correct Answer: B) Zero work. 57. The sum of kinetic and potential energy is- A) Mechanical Energy. B) Light energy. C) Heat Energy. D) None of the above. Show Answer Correct Answer: A) Mechanical Energy. 58. Which is the correct unit for expressing gravitational potential energy? A) M/s$^{2}$. B) Meter. C) Newton. D) Joule. Show Answer Correct Answer: D) Joule. 59. What is one advantage of fossil fuels? A) They are cheap. B) They are good for the environment. C) All the above. D) None of the above. Show Answer Correct Answer: A) They are cheap. 60. Which form of energy is needed by plants to make their own food? A) Potential. B) Light. C) Kinetic. D) Heat. Show Answer Correct Answer: B) Light. ← 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