This quiz works best with JavaScript enabled. Home > Class 11 > Class 11 Physics (Part I) Chapter 4 Work – Quiz 40 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Class 11 Physics (Part I) Chapter 4 Work Quiz 40 (25 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. What is the kinetic energy of a 10 kg ball moving at 3 m/s? A) 15 J. B) 30 J. C) 45 J. D) 90 J. Show Answer Correct Answer: C) 45 J. 2. What is the form of energy contained within a system because of the position or arrangement of its components? A) Potential energy. B) Chemical energy. C) Kinetic energy. D) Thermal energy. Show Answer Correct Answer: A) Potential energy. 3. A skateboarder exerts a force of 120 N and travels 300m. How much work is done? A) 36000 N. B) 36000 J. C) 2, 5 N. D) 2, 5 J. Show Answer Correct Answer: B) 36000 J. 4. A job is done slowly, and an identical job is done quickly. Both jobs require the same amount of ..... , but different amounts of ..... A) Work, energy. B) Power, work. C) Work, power. D) Force, work. Show Answer Correct Answer: C) Work, power. 5. An object falls under gravity. What happens to the gravitational potential energy and to the kinetic energy of the object? A) Decreases, decreases. B) Decreases, increases. C) Increases, decreases. D) Increases, increases. Show Answer Correct Answer: B) Decreases, increases. 6. When work is done in the body, A) It loses energy. B) It gains energy. C) Its energy remains constant. D) None of the above. Show Answer Correct Answer: B) It gains energy. 7. The amount of work done in a certain amount of time is known as A) Work. B) Effort force. C) Resistance force. D) Power. Show Answer Correct Answer: D) Power. 8. Ms. McDonald holds a desk perfectly still above her head. If she holds the desk at a height of 0.5 meters above her head, and applis 68 Newtons of force to do so, how much work has she done? A) 34 Joules. B) 0 Joules. C) All the above. D) None of the above. Show Answer Correct Answer: B) 0 Joules. 9. What is the rate at which work is done? A) Power. B) Joule. C) Work. D) Energy. Show Answer Correct Answer: A) Power. 10. Time rate at which work is done or energy is transferred A) Average work of power. B) Average power of a force. C) Average work of a force. D) Average force of power. Show Answer Correct Answer: D) Average force of power. 11. The ability of a body to do work is called ..... The ability of a body to do work because of its motion is called ..... A) Energy, kinetic energy. B) Energy, potential energy. C) Kinetic energy, Potential energy. D) Kinetic energy, energy. Show Answer Correct Answer: A) Energy, kinetic energy. 12. 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. 13. 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. 14. State the work-energy theorem in your own words. A) Kinetic energy is always constant regardless of work done. B) The work done on an object equals the change in its kinetic energy. C) The work done on an object is equal to its mass times velocity. D) Work is the only factor affecting an object's speed. Show Answer Correct Answer: B) The work done on an object equals the change in its kinetic energy. 15. 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%. 16. 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. 17. 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) 12 m/s. B) 8 m/s. C) 4 m/s. D) 2 m/s. Show Answer Correct Answer: B) 8 m/s. 18. Which law states that energy can be transformed, but cannot be created or destroyed? A) Law of conservation of matter. B) Newton's 1st Law. C) Newton's 3rd Law. D) Law of conservation of energy. Show Answer Correct Answer: D) Law of conservation of energy. 19. 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) 49 Joules. B) 98 Joules. C) 490 Joules. D) 980 Joules. Show Answer Correct Answer: C) 490 Joules. 20. 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) 0.49 J. B) 0.94 J. C) 1 J. D) 1.2 J. Show Answer Correct Answer: A) 0.49 J. 21. 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/2. C) MgL/8. D) MgL/16. Show Answer Correct Answer: C) MgL/8. 22. If you push a coffee mug 1.4 m using a force of 5 N, the work done on the mug is? A) 7 J. B) 6 J. C) 8 J. D) 9 J. Show Answer Correct Answer: A) 7 J. 23. 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. 24. 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. 25. 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) 0.98 J. B) 0.098J. C) 9.8 J. D) 98 J. Show Answer Correct Answer: B) 0.098J. ← 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