This quiz works best with JavaScript enabled. Home > Cbse > Class 11 > Science > Physics Part I > Class 11 Physics (Part I) Chapter 4 Work – Quiz 9 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Class 11 Physics (Part I) Chapter 4 Work Quiz 9 (60 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. What is the definition of work done on a system? A) Force exerted and the object moves in the opposite direction. B) Product of force and displacement of object in the direction of the force. C) A man pushed a wall and the wall did not moves. D) Work done and cause the energy out from the system. Show Answer Correct Answer: B) Product of force and displacement of object in the direction of the force. 2. Which of the following shows an energy transformation from chemical energy to electrical to light energy? A) A bolt of lightning lights the night sky. B) A candle glows brightly in the dark. C) A fire in a fireplace lights up a room. D) A battery causes a flashlight to shine. Show Answer Correct Answer: D) A battery causes a flashlight to shine. 3. If a machine does 500 J of work in 10 seconds, what is its power output? A) 5000 W. B) 500 W. C) 50 W. D) 5 W. Show Answer Correct Answer: D) 5 W. 4. Which is not a type of energy? A) Electromagnetic energy. B) Nuclear energy. C) Radio energy. D) Electrical energy. Show Answer Correct Answer: C) Radio energy. 5. A body of mass m = $10^{-2}$ $KV^2$ $v_0=10ms^{-1}$ A) $10^{-3}kgs^{-1}$. B) $10^{-3}kgm^{-1}$. C) $10^{-4}kgm^{-1}$. D) $10^{-1}kgm^{-1}s^{-1}$. Show Answer Correct Answer: C) $10^{-4}kgm^{-1}$. 6. W=125 Jd=10 mF=??? A) 1250 N. B) 135 N. C) 12.5 N. D) 0.08 N. Show Answer Correct Answer: C) 12.5 N. 7. A block of ice sliding down an incline has its maximum kinetic energy at ..... A) Halfway down. B) The bottom. C) Impossible to predict. D) The top. Show Answer Correct Answer: B) The bottom. 8. How much work is done on a 200-kg crate that is hoisted 2 m in a time of 4 s? A) 1600 J. B) 400 J. C) 1000 J. D) 4000 J. Show Answer Correct Answer: D) 4000 J. 9. Which scenario requires more work? A) Option 1 Abigail lifting her physics book one meter off her desk in one second. B) Option 2 Henry lifting his physics book one meter off his desk in two seconds. C) Both scenarios (Abigail & Henry) require the same amount of work. D) Neither scenarios (Abigail nor Henry) require any work. Show Answer Correct Answer: C) Both scenarios (Abigail & Henry) require the same amount of work. 10. How much work is done in holding a 15 N sack of potatoes while waiting in line at the grocery store for 3 minutes? A) 0 J. B) 5 J. C) 45 J. D) 15 J. Show Answer Correct Answer: A) 0 J. 11. If 68 W of power is produced in 18 seconds, how much work is done? A) 12.24 J. B) 3.77 J. C) 0.264 J. D) 1, 224 J. Show Answer Correct Answer: D) 1, 224 J. 12. What is the work done when a 20N force pushes a cart 3.5m? A) 6.8J. B) 17.5J. C) 23.5J. D) 70J. Show Answer Correct Answer: D) 70J. 13. Calculate the change in KE of a moving body if its velocity is reduced to 1/3 rd of its initial velocity. A) 1:9. B) 3:27. C) 9:1. D) None of the above. Show Answer Correct Answer: C) 9:1. 14. Kinetic energy can be calculated by using which formula? A) KE = mgh. B) KE = Fd. C) KE = $f\lambda$. D) KE = $\frac{1}{2}mv^2$. Show Answer Correct Answer: D) KE = $\frac{1}{2}mv^2$. 15. The value of zero work done depends on A) Only presence of displacement. B) Only presence of force. C) Presence of force and displacement. D) Absence of force or displacement. Show Answer Correct Answer: D) Absence of force or displacement. 16. What energy transformation occurs from a light bulb? A) Electrical energy = kinetic energy + potential energy. B) Electrical energy = electrical energy. C) Electrical energy = chemical energy. D) Electrical energy = light energy + thermal energy. Show Answer Correct Answer: D) Electrical energy = light energy + thermal energy. 17. If a force is applied at an angle to the direction of movement: A) No work is done. B) Maximum work is done. C) Less work is done than if the force was parallel. D) More work is done than if the force was parallel. Show Answer Correct Answer: C) Less work is done than if the force was parallel. 18. If you drive your 1, 000 kg car from sea level up to the Nu'uanu Pali lookout, which is 366 m above sea level, how much will you have increased your car's gravitational potential energy? A) 586, 800 J. B) 366, 000 J. C) 3, 586, 800 J. D) 3, 000, 000 J. Show Answer Correct Answer: C) 3, 586, 800 J. 19. Mechanical energy is the sum of which two types of energy? A) Kinetic energy and potential energy. B) Kinetic energy and electric potential energy. C) Potential energy and spring constant. D) Gravitational potential energy and electric potential energy. Show Answer Correct Answer: A) Kinetic energy and potential energy. 20. What are the factors affect gravitational potential energy? A) Mass and Velocity. B) Mass, Acceleration due to gravity, and Height. C) Mass, Acceleration due to gravity and Time. D) None of the above. Show Answer Correct Answer: B) Mass, Acceleration due to gravity, and Height. 21. What is an example of a force? A) Power. B) Energy. C) Pressure. D) Weight. Show Answer Correct Answer: D) Weight. 22. State the law of conservation of energy A) Energy is not destroyed, but changed from one form to another. B) Energy can neither be created nor destroyed, but can only be changed from one form to another. C) Energy in a body remains constant throughout its motion. D) Kinetic energy and potential energy in a body are constant. Show Answer Correct Answer: B) Energy can neither be created nor destroyed, but can only be changed from one form to another. 23. If an object has a gravitational potential energy of 200 J and is raised to twice its original height, what will be its new potential energy? A) 800 J. B) 100 J. C) 400 J. D) 200 J. Show Answer Correct Answer: C) 400 J. 24. Which of the following best describes work? A) Product of force and displacement. B) Energy consumed per unit time. C) Push or pull on an object. D) Ability to create change. Show Answer Correct Answer: A) Product of force and displacement. 25. Kinetic energy is energy that is (a) A) Stored. B) Destroyed. C) Moving. D) Created. Show Answer Correct Answer: C) Moving. 26. Martinus Kuiper of the Netherlands ice skated for 24 h with an average speed of 6.3 m/s. Suppose Kuiper's mass was 65 kg. If Kuiper provided 520 W of power to accelerate for 2.5 s, how much work did he do? (Use g = 9.8 m/s$^{2}$.) A) 3276 J. B) 4013 J. C) 12480 J. D) 1300 J. Show Answer Correct Answer: D) 1300 J. 27. A water pump raises 50 litre of water through a height of 25 m in 5 seconds. The power of the pump is ..... [Take g=10 N/kg] A) 250 kW. B) 2500 W. C) 25 kW. D) 250 W. Show Answer Correct Answer: B) 2500 W. 28. Which requires more work-a person walking up stairs or a person running up stairs? A) They require equal work. B) Running. C) Walking. D) No work is required for either because the movement is vertical. Show Answer Correct Answer: A) They require equal work. 29. The engine of a car does work, W, to increase the velocity of the car from 0 to v. The work done by the engine to increase the velocity from v to 2v is ..... A) 4W. B) 2W. C) 3W. D) 5W. Show Answer Correct Answer: C) 3W. 30. Which term describes the amount of work done divided by the time interval? A) Work. B) Power. C) Force. D) None of the above. Show Answer Correct Answer: B) Power. 31. Two bodies of equal masses move with the uniform velocities v and 3v respectively. Find the ratio of their kinetic energy? A) 1:3. B) 9:4. C) 4:5. D) 3:5. Show Answer Correct Answer: A) 1:3. 32. Energy consumed by home appliances are conveniently measured in A) Kilowatt-hours. B) Kilowatts. C) Joules. D) Watt meters. Show Answer Correct Answer: A) Kilowatt-hours. 33. The teacher instructed three students 'A', 'B' and 'C' respectively to prepare a 50% (mass by volume) solution of sodium hydroxide (NaOH). 'A' dissolved 50g of NaOH in 100 mL of water, 'B' dissolved 50g of NaOH in 100g of water while 'C' dissolved 50g of NaOH in water to make 100 mL of solution. Which one of them has made the desired solution? A) A. B) B. C) C. D) None of them. Show Answer Correct Answer: C) C. 34. Which of the following is a true statement about work? A) It measures the change in an object's rate of speed. B) It measures how much time it takes to move a massive object. C) It measures how much effort is applied over a certain distance. D) It measures how quickly an object accelerates. Show Answer Correct Answer: C) It measures how much effort is applied over a certain distance. 35. True or FalseIt is easy to find a place to create tidal power. A) True. B) False. C) All the above. D) None of the above. Show Answer Correct Answer: B) False. 36. If you push a cart with a force of 60 N for 2 m, how much work have you done if the force was in the same direction as the displacement? A) 120 J. B) 30 J. C) 30 N. D) 120 N. Show Answer Correct Answer: A) 120 J. 37. Potential energy is due to the ..... of object. A) Mass. B) Speed. C) Height. D) Size. Show Answer Correct Answer: C) Height. 38. When an object falls freely under the influence of gravity, what happens to its potential energy and kinetic energy as it descends? A) Potential energy increases, kinetic energy increases. B) Potential energy decreases, kinetic energy increases. C) Potential energy decreases, kinetic energy remains constant. D) Potential energy remains constant, kinetic energy decreases. Show Answer Correct Answer: B) Potential energy decreases, kinetic energy increases. 39. State the Work-Energy Theorem. A) The Work-Energy Theorem states that energy cannot be created or destroyed. B) The Work-Energy Theorem states that potential energy is equal to kinetic energy. C) The Work-Energy Theorem states that the work done is always zero. D) The Work-Energy Theorem states that the work done on an object is equal to the change in its kinetic energy. Show Answer Correct Answer: D) The Work-Energy Theorem states that the work done on an object is equal to the change in its kinetic energy. 40. If a force is applied to an object, but the object doesn't move, how much work is done? A) Negative work. B) It depends on the force applied. C) Positive work. D) Zero work. Show Answer Correct Answer: D) Zero work. 41. A 50 kg object is lifted to a height of 10 meters. What is the potential energy of the object at this height? (Use $g = 9.8 \, m/s^2$ A) 500 J. B) 490 J. C) 980 J. D) 4900 J. Show Answer Correct Answer: D) 4900 J. 42. How much work is necessary to double the speed of a moving object? A) Twice the work done. B) Zero work. C) Four times the work done. D) Same work. Show Answer Correct Answer: C) Four times the work done. 43. How many joules of work are done against a cart when a force of 50 N pushes it 1 kilometer away? A) 7000 J. B) 5500 J. C) 6600 J. D) 5000 J. Show Answer Correct Answer: D) 5000 J. 44. The unit of work is the ..... A) Joule. B) Force. C) All the above. D) None of the above. Show Answer Correct Answer: A) Joule. 45. What is the rate of doing work called? A) Power. B) Energy. C) Work. D) Force. Show Answer Correct Answer: A) Power. 46. The SI unit in which kinetic energy is measured is A) Metres per second. B) Joules. C) Kilogram. D) Newton. Show Answer Correct Answer: B) Joules. 47. Name the quantity which is measured in kW A) Energy. B) Power. C) Work. D) None of the above. Show Answer Correct Answer: B) Power. 48. A person lifts a crate vertically upwards at constant velocity through a distance h. The person does work x on the crate in time t. The person now lifts the same crate vertically upwards at constant velocity through the same distance, but in time 2t.The work done by the person on the crate will now be ..... A) $\frac{ }{ }4x$. B) $\frac{ }{ }2x$. C) $\frac{1}{2}x$. D) $\frac{ }{ }x$. Show Answer Correct Answer: D) $\frac{ }{ }x$. 49. What is the equation used to find power? A) J/s. B) N x m. C) F=m x A. D) None of the above. Show Answer Correct Answer: A) J/s. 50. What is the equation to calculate work when force and displacement are in the same direction? A) $W=P\Delta V$. B) $W=P\left(A\times d\right)$. C) $W=Fd\cos\left(\theta\right)$. D) $W=F\cdot d$. Show Answer Correct Answer: D) $W=F\cdot d$. 51. A 10 gram ball is rolling at 3 m/s. How much energy does it have? A) .045J. B) 4.5J. C) 15 J. D) 30 J. Show Answer Correct Answer: A) .045J. 52. What is the PE (Potential Energy) of a 250 kg boulder at the edge of the mountain that is 60 m high? A) 150, 000 J. B) 100 J. C) 147 KJ. D) 500 KJ. Show Answer Correct Answer: C) 147 KJ. 53. A construction worker pushes a wheelbarrow 10 m with a horizontal force of 5 N. How much work is done by the worker on the wheelbarrow? A) 5 J. B) 15 J. C) 50 J. D) 2 J. Show Answer Correct Answer: C) 50 J. 54. What is the definition of work? A) Product of force (F) and displacement (s) in perpendicular direction with the force. B) Product of force (F) and displacement in the same direction as the force. C) The amount of force acting on the object but the object does not move. D) The amount of energy used to stop the moving object. Show Answer Correct Answer: B) Product of force (F) and displacement in the same direction as the force. 55. Which of the following statements is true about energy? A) Energy cannot change forms. B) Energy can be destroyed. C) Energy can be transformed. D) Energy can be created. Show Answer Correct Answer: C) Energy can be transformed. 56. A forklift lifts a box as high as 1.7m in 14 seconds. If the box weighs 1690kg, calculate the power used by the forklift to lift the box. A) 2113.25 W. B) 2013.14 W. C) 2213.45 W. D) None of the above. Show Answer Correct Answer: B) 2013.14 W. 57. A race car has a mass of 1500 kg. If the kinetic energy is 675, 000 J, what is the velocity of the racecar? A) 900 m/s. B) 1500 m/s. C) 21.21 m/s. D) 30 m/s. Show Answer Correct Answer: D) 30 m/s. 58. What does the Work-Kinetic Energy Theorem state? A) The work done on an object by a net force equals the change in kinetic energy of the object. B) The work done on an object by a net force equals the change in potential energy of the object. C) The work done on an object by a net force equals the change in gravitational potential energy of the object. D) The work done on an object by a net force equals the change in mechanical energy of the object. Show Answer Correct Answer: A) The work done on an object by a net force equals the change in kinetic energy of the object. 59. Potential energy depends on ..... & ..... A) Mass, position. B) Mass, weight. C) Speed, position. D) Mass, speed. Show Answer Correct Answer: A) Mass, position. 60. By how much does kinetic energy increase if the momentum is increased by 20% A) 44%. B) 55%. C) 66%. D) 77%. Show Answer Correct Answer: A) 44%. ← 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