This quiz works best with JavaScript enabled. Home > Cbse > Class 11 > Science > Physics Part I > Class 11 Physics (Part I) Chapter 4 Work – Quiz 13 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Class 11 Physics (Part I) Chapter 4 Work Quiz 13 (60 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. Science Steve gradually slows down the car and brings it to a complete stop as he approaches a red light with his daughter Cynthia. Is work being done on the car during the slow down? A) Yes. B) No. C) All the above. D) None of the above. Show Answer Correct Answer: A) Yes. 2. A set of pulleys lifts an 800 N crate 4 meters in 7 seconds. What power was used? A) 1400 W. B) .035 W. C) 457.1 W. D) 28.6 W. Show Answer Correct Answer: C) 457.1 W. 3. True or false:when the distance an object moves is zero the work done on the object is also zero. A) True. B) False. C) All the above. D) None of the above. Show Answer Correct Answer: A) True. 4. Kinetic energy depends on the ..... and ..... of the object. A) Height and Mass. B) Spring constant and Distance away from equilibrium. C) Mass and Velocity. D) Height and Friction. Show Answer Correct Answer: C) Mass and Velocity. 5. A 5 kg mass has 100 J of potential energy with respect to the ground. Approximately how high above the ground is the mass? A) 1 m. B) 2 m. C) 3 m. D) 4 m. E) None of these. Show Answer Correct Answer: B) 2 m. 6. If 100 J of energy is transformed into work, how much energy remains? A) 10 J. B) 0 J. C) 50 J. D) 25 J. Show Answer Correct Answer: B) 0 J. 7. Which row gives the energy change in a battery and the energy change in a solar cell? A) Battery = chemical to electrical, solar cell = electrical to light. B) Battery = electrical to chemical, solar cell = electrical to light. C) Battery = chemical to electrical, solar cell = light to electrical. D) Battery = electrical to chemical, solar cell = light to electrical. Show Answer Correct Answer: C) Battery = chemical to electrical, solar cell = light to electrical. 8. If you do 100 J of work to lift a TV up to the 2nd floor, how much potential energy will the TV have? A) Impossible to tell. B) 300 J. C) 200 J. D) 100 J. Show Answer Correct Answer: D) 100 J. 9. A force of 1500 N is applied during the drive off from a sprint start. The centre of mass moves a distance 0.4 m. What work is done? A) 3750 J. B) 1200 J. C) 600 J. D) 1500 J. Show Answer Correct Answer: C) 600 J. 10. Power can be calculated from energy and what? A) Time. B) Work. C) Force. D) None of the above. Show Answer Correct Answer: A) Time. 11. What happens when work is done on an object? A) The object's temperature always increases. B) The object loses mass. C) Energy is transferred to the object. D) The object's volume changes. Show Answer Correct Answer: C) Energy is transferred to the object. 12. An escalator in an underground station has 250 people standing on it and is moving with a velocity of 4.3 ms$^{-1}$. The average mass of a person is 78 kg and the angle of the escalator to the horizontal is 40$^{o}$.What is the minimum power required to lift these people? A) 54kW. B) 64kW. C) 630kW. D) 530kW. Show Answer Correct Answer: D) 530kW. 13. Which of the following is NOT work? A) A Force acting over a distance. B) A change in kinetic energy. C) A change in potential energy. D) A change in mass. Show Answer Correct Answer: D) A change in mass. 14. What is the ratio of output force to the input force applied to a mechanism called? A) Joule. B) Efficiency. C) Watt. D) Mechanical Advantage. Show Answer Correct Answer: D) Mechanical Advantage. 15. How is power defined in terms of work and time? A) Power = force * distance. B) Power = work / time. C) Power = time / work. D) Power = work * time. Show Answer Correct Answer: B) Power = work / time. 16. Kinetic Energy is defined as A) Energy stored due to its location. B) Energy of motion. C) Heat energy. D) Energy stored in the bonds of molecules. Show Answer Correct Answer: B) Energy of motion. 17. Definition of work energy theorem is, the work done by the nett force on a body equals to the ..... A) Change in the body's potential energy. B) Change in the body's kinetic energy. C) Change in the body's gravitational energy. D) Change in the body's elestic energy. Show Answer Correct Answer: B) Change in the body's kinetic energy. 18. Two billiard balls, each moving at 1 m/s, roll toward each other and collide. Suppose after bouncing apart, each moves at 2 m/s. The collision violates the conservation of ..... A) Momentum. B) Kinetic energy. C) Both of these. D) None of these. Show Answer Correct Answer: C) Both of these. 19. A body is lifted against gravity. Which equation shows the work done on the body? A) Work done = change in force on the body. B) Work done = change in power of the body. C) Work done = change in energy of the body. D) Work done = change in distance moved by the body. Show Answer Correct Answer: C) Work done = change in energy of the body. 20. A boy weighing 50kg runs up a staircase of 40 steps, each of 16cm, in 10s. Calculate his power (G= 10m/s) A) 120 W. B) 80 W. C) 320 W. D) 480 W. Show Answer Correct Answer: C) 320 W. 21. The S.I. unit of power is A) Kilowatts(kW). B) Watts (W). C) Joules (J). D) Volts (V). Show Answer Correct Answer: B) Watts (W). 22. You lift a 2 kg book off the ground by 3 meters. How much gravitational potential energy is stored in the book? A) 6 J. B) 29.4 J. C) 58.8 J. D) 19.6 J. Show Answer Correct Answer: C) 58.8 J. 23. If a lion drags his prey 10 meters to his den doing 500 joules of work, how much force did he use? A) 500 Joules. B) 50, 000 Newtons. C) 10 Newtons. D) 50 Newtons. Show Answer Correct Answer: D) 50 Newtons. 24. When a rollercoaster cart moves towards the ground, what happens to the PE that it has? A) Nothing. B) It transforms into KE. C) It leaves the system. D) It stays PE. Show Answer Correct Answer: B) It transforms into KE. 25. What is the value for g (gravity)? A) 9 m/s. B) 8.9 m/s. C) 99.8 m/s. D) 9.8 m/s. Show Answer Correct Answer: D) 9.8 m/s. 26. When do we say that work is done on an object? A) There must be a force acting on the object. B) There must be an energy transferred on the object. C) The force acting is parallel to the object's displacement. D) The force acting is perpendicular to the object's displacement. Show Answer Correct Answer: C) The force acting is parallel to the object's displacement. 27. What is the transfer of energy by thermal interactions called? A) Work. B) Potential energy. C) Kinetic energy. D) Heat. Show Answer Correct Answer: D) Heat. 28. Which of the following possesses elastic energy? A) Heating water. B) Throwing football. C) Winding the mainspring of a clock. D) Bicycle coasting along a level road. Show Answer Correct Answer: C) Winding the mainspring of a clock. 29. Power applied to a particle varies with time as P = (3t2-2t + 1) watt, where t is in second. Find the change in its kinetic energy between t = 2 sec and t = 4 sec. A) 61 J. B) 102 J. C) 46 J. D) 32 J. Show Answer Correct Answer: C) 46 J. 30. A pump delivers water at the rate of 2400 liters in six minutes over a head of 12 m. If g = 10 m/s$^{2}$, its power is A) 24 kW. B) 240 W. C) 800 W. D) 200 W. Show Answer Correct Answer: C) 800 W. 31. In order to INCREASE the potential energy of an object, you need to: A) Put the object lower to the ground. B) Raise the object higher. C) All the above. D) None of the above. Show Answer Correct Answer: B) Raise the object higher. 32. A roller coaster whose average speed is 32 m/s is at the top of a 72m hill and weighs 966N. At the top of the hill the coaster car has ..... energy. A) Only kinetic energy. B) Only potential energy. C) Mostly kinetic energy. D) Both kinetic and potential energy. Show Answer Correct Answer: B) Only potential energy. 33. A 40-kg person is climbing 3 m up a flight of stairs in 6 seconds. How much work did they do climbing the stairs? A) 1200 J. B) 200 J. C) 400 J. D) 120 J. Show Answer Correct Answer: A) 1200 J. 34. The kinetic energy of a body decreases by 19%. What is the percentage decrease in momentum? A) 20%. B) 15%. C) 5%. D) 10%. Show Answer Correct Answer: D) 10%. 35. What is g on Earth? A) 42 m/s/s. B) 9.8 m/s. C) 42 m*s. D) 9.8 m/s/s. Show Answer Correct Answer: D) 9.8 m/s/s. 36. A major league pitcher can throw a baseball with a kinetic energy of 150J. How much work must the pitcher do to the ball to give it that much kinetic energy A) 0 J. B) 50J. C) 150 J. D) 300 J. Show Answer Correct Answer: C) 150 J. 37. Describe a real-life example of energy conservation. A) Using high-energy appliances for daily tasks. B) Using energy-efficient LED light bulbs instead of incandescent bulbs. C) Leaving lights on in unoccupied rooms. D) Using traditional incandescent bulbs for lighting. Show Answer Correct Answer: B) Using energy-efficient LED light bulbs instead of incandescent bulbs. 38. A 47kg ballet dancer leaps across the floor at 1m/s. How much kinetic energy does she have? A) 94 J. B) 123 J. C) 53.8 J. D) 23.5 J. Show Answer Correct Answer: D) 23.5 J. 39. Which of the following is defined as an energy transfer? A) Work. B) Chemical energy. C) Kinetic energy. D) Potential energy. Show Answer Correct Answer: A) Work. 40. Newtons are the unit for ..... A) Force. B) Work. C) Acceleration. D) Distance. Show Answer Correct Answer: A) Force. 41. What is the significance of the conservation of energy principle? A) Energy can be created and destroyed. B) Energy can only be transformed from one form to another. C) Energy is a finite resource that can be depleted. D) Energy can be transferred but not transformed. Show Answer Correct Answer: B) Energy can only be transformed from one form to another. 42. A car, travelling on a straight horizontal road, has 1.6 MJ of kinetic energy. It accelerates for 20 s until it has 2.5 MJ of kinetic energy. What is the average power output used to increase the kinetic energy of the car? A) 205 kW. B) 45 W. C) 205 W. D) 45 kW. Show Answer Correct Answer: D) 45 kW. 43. What happens to energy in a swinging pendulum at its highest point? A) Maximum kinetic energy, zero potential energy. B) Maximum potential energy, zero kinetic energy. C) Equal potential and kinetic energy. D) No energy at all. Show Answer Correct Answer: B) Maximum potential energy, zero kinetic energy. 44. What is the equation used for calculating power from force and velocity A) Power = force * velocity. B) Power = force + velocity. C) Power = force/velocity. D) Power = velocity / force. Show Answer Correct Answer: A) Power = force * velocity. 45. The following are conservative force except A) Frictional force. B) Gravitational force. C) Spring force. D) None of the option. Show Answer Correct Answer: A) Frictional force. 46. Explain the principle of conservation of energy. A) Energy is only lost during transformations. B) Energy cannot be created or destroyed, only transformed; total energy in a closed system remains constant. C) Total energy in a closed system can increase over time. D) Energy can be created from nothing. Show Answer Correct Answer: B) Energy cannot be created or destroyed, only transformed; total energy in a closed system remains constant. 47. If 2.0 J of work is done in raising a 180 g apple, how far is it lifted? (Use g = 9.8 m/s$^{2}$.) A) 11.11 m. B) 1.13 m. C) 90 m. D) 1.11 x 10$^{-2}$ m. Show Answer Correct Answer: B) 1.13 m. 48. What is the unit of power in the International System of Units (SI)? A) Watt. B) Pascal. C) Newton. D) Joule. Show Answer Correct Answer: A) Watt. 49. What is power in terms of work and time? A) Power = Work / Time. B) Power = Time / Work. C) Power = Work-Time. D) Power = Work + Time. Show Answer Correct Answer: A) Power = Work / Time. 50. How much work is done to slow a 800kg car from 20m/s to 5m/s A) 15 kj. B) 90 kj. C) 400 kj. D) 150 kj. Show Answer Correct Answer: D) 150 kj. 51. In a marathon, the winner and the runner-up have the same mass. Compared with the runner-up, the winner has more ..... A) Energy. B) Work. C) Power. D) Force. Show Answer Correct Answer: C) Power. 52. The kinetic energy of a car moving at constant velocity v is K. The velocity of the car changes to 2v. What is the new kinetic energy of the car? A) $\frac{1}{2}K$. B) 2K. C) $\frac{1}{4}K$. D) 4K. Show Answer Correct Answer: D) 4K. 53. Work done = Force x blank? A) Velocity. B) Acceleration. C) Distance. D) Speed. Show Answer Correct Answer: C) Distance. 54. Work is measured in which unit? A) Watt. B) Joule. C) Kilogram. D) Newton. Show Answer Correct Answer: B) Joule. 55. What is the relationship between work done and energy transfer? A) Work done is always more than energy transferred. B) They are equivalent quantities. C) Work done is always less than energy transferred. D) They are opposite quantities. Show Answer Correct Answer: B) They are equivalent quantities. 56. Which of the following is a measure of power? A) 100 watts. B) 100 newtons. C) 100 meters per second. D) 100 joules. Show Answer Correct Answer: A) 100 watts. 57. Both work and energy are ..... quantities. A) Vector. B) Physical. C) Scalar. D) Numerical. Show Answer Correct Answer: C) Scalar. 58. What is the kinetic energy of an 9 kg bowling ball rolling at 3.30 m/s? A) 29.7 J. B) 14.85 J. C) 49.005 J. D) 323.4 J. Show Answer Correct Answer: C) 49.005 J. 59. According to the video, what is the capacity to do work or produce heat? A) Energy. B) Heat. C) Mass. D) Work. Show Answer Correct Answer: A) Energy. 60. A man carries 20 tiles from the ground to the roof of a house. Each tile has a mass of 1.2 kg. The roof of the house is 15 m above the ground.How much work does the man do against gravity on the tiles in carrying them to the roof? A) 360 J. B) 36 J. C) 180 J. D) 3600 J. Show Answer Correct Answer: D) 3600 J. ← 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