This quiz works best with JavaScript enabled. Home > Class 11 > Class 11 Physics (Part I) Chapter 4 Work – Quiz 21 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Class 11 Physics (Part I) Chapter 4 Work Quiz 21 (25 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. 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) 15 J. B) 45 J. C) 0 J. D) 5 J. Show Answer Correct Answer: C) 0 J. 2. If 68 W of power is produced in 18 seconds, how much work is done? A) 1, 224 J. B) 0.264 J. C) 3.77 J. D) 12.24 J. Show Answer Correct Answer: A) 1, 224 J. 3. What is the work done when a 20N force pushes a cart 3.5m? A) 70J. B) 6.8J. C) 23.5J. D) 17.5J. Show Answer Correct Answer: A) 70J. 4. 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. 5. Kinetic energy can be calculated by using which formula? A) KE = Fd. B) KE = mgh. C) KE = $\frac{1}{2}mv^2$. D) KE = $f\lambda$. Show Answer Correct Answer: C) KE = $\frac{1}{2}mv^2$. 6. 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. 7. 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. 8. 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. 9. 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) 3, 000, 000 J. B) 366, 000 J. C) 3, 586, 800 J. D) 586, 800 J. Show Answer Correct Answer: C) 3, 586, 800 J. 10. 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. 11. 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. 12. What is an example of a force? A) Energy. B) Power. C) Pressure. D) Weight. Show Answer Correct Answer: D) Weight. 13. 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. 14. 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) 100 J. B) 200 J. C) 400 J. D) 800 J. Show Answer Correct Answer: C) 400 J. 15. 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. 16. Kinetic energy is energy that is (a) A) Stored. B) Destroyed. C) Created. D) Moving. Show Answer Correct Answer: D) Moving. 17. 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) 1300 J. B) 3276 J. C) 4013 J. D) 12480 J. Show Answer Correct Answer: A) 1300 J. 18. 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 W. B) 2500 W. C) 25 kW. D) 250 kW. Show Answer Correct Answer: B) 2500 W. 19. Which requires more work-a person walking up stairs or a person running up stairs? A) Walking. B) Running. C) They require equal work. D) No work is required for either because the movement is vertical. Show Answer Correct Answer: C) They require equal work. 20. 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) 3W. B) 5W. C) 4W. D) 2W. Show Answer Correct Answer: A) 3W. 21. 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. 22. 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) 3:5. C) 9:4. D) 4:5. Show Answer Correct Answer: A) 1:3. 23. Energy consumed by home appliances are conveniently measured in A) Watt meters. B) Kilowatts. C) Joules. D) Kilowatt-hours. Show Answer Correct Answer: D) Kilowatt-hours. 24. 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. 25. Which of the following is a true statement about work? A) It measures how quickly an object accelerates. B) It measures how much effort is applied over a certain distance. C) It measures the change in an object's rate of speed. D) It measures how much time it takes to move a massive object. Show Answer Correct Answer: B) It measures how much effort is applied over a certain distance. ← PreviousNext →Related 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 8Class 11 Physics (Part I) Chapter 4 Work Quiz 9Class 11 Physics (Part I) Chapter 4 Work Quiz 10 🏠 Back to Homepage 📘 Download PDF Books 📕 Premium PDF Books