This quiz works best with JavaScript enabled. Home > Cbse > Class 11 > Science > Physics Part I > Class 11 Physics (Part I) Chapter 4 Work – Quiz 8 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Class 11 Physics (Part I) Chapter 4 Work Quiz 8 (60 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. A ball is projected upwards, As it rises there is increase in its A) Momentum. B) Potential energy. C) Kinetic energy. D) Retardation. Show Answer Correct Answer: B) Potential energy. 2. What is Work in physics? A) Work is the energy transferred to an object by applying a force over a distance. B) Work is the speed at which an object moves. C) Work is the amount of force applied to an object regardless of distance. D) Work is the total energy of an object at rest. Show Answer Correct Answer: A) Work is the energy transferred to an object by applying a force over a distance. 3. Which requires more power-a person walking up stairs or a person running up stairs? A) Walking. B) Running. C) They require equal power output. D) No power is required at all. Show Answer Correct Answer: B) Running. 4. In physical science, this is the use of force to move an object some distance A) Power. B) Work. C) Energy. D) None of the above. Show Answer Correct Answer: B) Work. 5. A jeweller needs to melt gold so he can make a ring. Which form of energy does he need? A) Light. B) Heat. C) Elastic Potential Energy. D) Kinetic. Show Answer Correct Answer: B) Heat. 6. What is unit used to express power? A) Watt. B) Joule. C) All the above. D) None of the above. Show Answer Correct Answer: A) Watt. 7. Kinetic energy is associated with ..... A) Speed. B) Position. C) Direction. D) Temperature. Show Answer Correct Answer: A) Speed. 8. A particle is subjected to a force F=2i+3j and undergoes a displacement r=4i+5j. The work done by the force is: A) 23 J. B) 28 J. C) 26 J. D) 35 J. Show Answer Correct Answer: C) 26 J. 9. The SI unit of work is? A) Meters. B) Watts. C) Joules. D) Newtons. Show Answer Correct Answer: C) Joules. 10. Which of the following statements is true about energy conservation in a closed system? A) Energy remains constant without any transformation. B) Energy is always lost as heat. C) Energy can be created or destroyed. D) Energy can only be transferred or transformed. Show Answer Correct Answer: D) Energy can only be transferred or transformed. 11. What is the law of physics that states energy cannot be created or destroyed? A) Boyle's Law. B) Einstein's Theory. C) Newton's Law. D) Law of Conservation of Energy. Show Answer Correct Answer: D) Law of Conservation of Energy. 12. What is the difference between calculating power and work? A) Power is force/area. B) Work is force/area. C) Work takes into account the time it takes to complete a task. D) Power takes into account the time it takes to complete a task. Show Answer Correct Answer: D) Power takes into account the time it takes to complete a task. 13. A force moves a box 150m at an angle of 25 degrees from horizontal, doing 545J of work against friction. Calculate the force. A) 6.9N. B) 9.5N. C) 3.6N. D) 4.0N. Show Answer Correct Answer: D) 4.0N. 14. Kinetic energy + Potential energy = A) Total potential energy. B) Total mechanical energy. C) Total kinetic energy. D) Total thermal energy. Show Answer Correct Answer: B) Total mechanical energy. 15. Work is done only by the part of the force that is in the same direction as the what? A) Force. B) Angle. C) Motion. D) None of the above. Show Answer Correct Answer: C) Motion. 16. In which case is NO work done? A) Lifting a box vertically. B) Pushing a cart horizontally. C) Holding a heavy box stationary. D) Rolling a ball down a hill. Show Answer Correct Answer: C) Holding a heavy box stationary. 17. Energy is the ability A) To do work. B) To stay awake. C) To try to lift a heavy object. D) To have fun. Show Answer Correct Answer: A) To do work. 18. A 60 watt light bulb requires how many joules of energy to shine at its rated brightness? A) 120. B) 30. C) 60. D) None of the above. Show Answer Correct Answer: C) 60. 19. How does energy conservation apply to a pendulum? A) The pendulum only converts thermal energy. B) Energy conservation in a pendulum involves the conversion between potential and kinetic energy. C) The pendulum's energy remains constant without any conversion. D) Energy is lost as sound during the swing. Show Answer Correct Answer: B) Energy conservation in a pendulum involves the conversion between potential and kinetic energy. 20. Which of the following is required to have gravitational potential energy? A) Kinetic Energy. B) Velocity. C) Time. D) Height. Show Answer Correct Answer: D) Height. 21. Which of the following is the unit of WORK. A) Volt, V. B) Newton, N. C) Watt, W. D) Joule, J. Show Answer Correct Answer: D) Joule, J. 22. If a machine does 1500 J of work in 10 seconds, what is its power output? A) 1500 W. B) 1.5 W. C) 150 W. D) 15 W. Show Answer Correct Answer: C) 150 W. 23. This is the energy of vibrating molecules that move through matter. A) Thermal. B) Electrical. C) Sound. D) Mechanical. Show Answer Correct Answer: C) Sound. 24. What is the gravitational potential energy of a 4kg mass sitting on top of a table 5 m high. ( Take g = 10 ms$^{-2 }$) A) 100 J. B) 200 J. C) 20 J. D) 40 J. Show Answer Correct Answer: B) 200 J. 25. How does the work-energy theorem relate to kinetic energy? A) The work-energy theorem relates to kinetic energy by stating that the work done on an object results in a change in its kinetic energy. B) The work-energy theorem states that energy cannot be created or destroyed. C) The work-energy theorem only applies to potential energy changes. D) Kinetic energy is independent of the work done on an object. Show Answer Correct Answer: A) The work-energy theorem relates to kinetic energy by stating that the work done on an object results in a change in its kinetic energy. 26. A 2kg ball and a 4kg ball are released from rest at the same height at the same time. After falling for 3 seconds, the balls will have different ..... A) Velocities. B) Kinetic Energies. C) Heights. D) None of the above. Show Answer Correct Answer: B) Kinetic Energies. 27. Which energy transformation below matches?Animals eating food? A) Electrical to potential. B) Chemical to kinetic. C) Potential to chemical. D) None of the above. Show Answer Correct Answer: B) Chemical to kinetic. 28. Energy and work are measured in ..... A) Joules. B) Hertz. C) Newtons. D) Kilograms. Show Answer Correct Answer: A) Joules. 29. Which of the following quantities is multiplied to force which results to the work done? A) Displacement. B) Distance. C) Velocity. D) Accelaration. Show Answer Correct Answer: A) Displacement. 30. Susan and Joe push a table 18 meters down a hall by exerting a force of 200 newtons (N). What is the total amount of work done on the table? A) 1600 J. B) 3600 J. C) 1800 J. D) 2000 J. Show Answer Correct Answer: B) 3600 J. 31. The rate at which one form of energy is transformed into another. A) Force. B) Power. C) Work. D) Energy. Show Answer Correct Answer: B) Power. 32. If two cars do the same amount of work but one has more power, what's the difference? A) The more powerful car completes the work in less time. B) The more powerful car applies less force. C) The more powerful car travels a shorter distance. D) The more powerful car uses less energy. Show Answer Correct Answer: A) The more powerful car completes the work in less time. 33. Force multiplied by distance equals ..... A) Work. B) Power. C) All the above. D) None of the above. Show Answer Correct Answer: A) Work. 34. Which one of the following situations will there be an increase in the kinetic energy? A) A stone is thrown upward until it reaches maximum height. B) A ball starts from rest and freely rolls downhill. C) A box is pulled across a rough floor at constant speed. D) A satellite travels in a circular orbit around the Earth at fixed altitude. Show Answer Correct Answer: B) A ball starts from rest and freely rolls downhill. 35. You do work against gravity when you walk up some stairs. A) True. B) False. C) All the above. D) None of the above. Show Answer Correct Answer: A) True. 36. What power will be delivered in a constant amount of work if the time interval is doubled? A) Decreased by one-fourth. B) Decreased by half. C) Remains the same. D) Doubled. Show Answer Correct Answer: B) Decreased by half. 37. What is the work done by earth in moving around the sun? A) 2 trillion J. B) 1 billion J. C) 0 J. D) 1000000 J. Show Answer Correct Answer: C) 0 J. 38. What is the energy of a moving object called? A) Potential energy. B) Thermal energy. C) Kinetic energy. D) Mechanical energy. Show Answer Correct Answer: C) Kinetic energy. 39. A girl pushes a sled across the snow with a force of 25 N. If she does 250 J of work, how far does she push the sled? A) 1 m. B) 10 m. C) 10 N/s. D) 10 W. Show Answer Correct Answer: B) 10 m. 40. The PE of a boulder on a hill will be ..... the KE of the boulder as it rolls down the hill. A) Greater than. B) Less than. C) The same as. D) None of the above. Show Answer Correct Answer: A) Greater than. 41. What are the units of power? A) Volt (V). B) Watt (W). C) Joule (J). D) Newton (N). Show Answer Correct Answer: B) Watt (W). 42. The value of 10 horsepower in kilowatt is A) 9.821 kW. B) 3.245 kW. C) 7.457 kW. D) 5.678 kW. Show Answer Correct Answer: C) 7.457 kW. 43. The value of work done depends on A) The time of day. B) Force and displacement. C) Various factors such as the force applied, the distance over which the force is applied, and the angle between the force and the displacement. D) The color of the object. Show Answer Correct Answer: C) Various factors such as the force applied, the distance over which the force is applied, and the angle between the force and the displacement. 44. People get energy from the food that they eat and transform that energy as they move. Which energy transformations occur as a student rapidly rubs the palms of his hands together? A) Mechanical to thermal to electrical. B) Chemical to sound to electrical. C) Chemical to mechanical to thermal. D) Mechanical to chemical to sound. Show Answer Correct Answer: C) Chemical to mechanical to thermal. 45. At time t = 0 s particle starts moving along the x-axis. If its kinetic energy increases uniformly with time 't', the net force acting on it must be proportional to A) T. B) Constant. C) $\sqrt{t}$. D) $\frac{1}{\sqrt{t}}$. Show Answer Correct Answer: D) $\frac{1}{\sqrt{t}}$. 46. A man of mass 75 kg runs up a staircase consisting of 30 steps. Each step is 20 cm high.The man takes a time of 7.0 s to run from the bottom of the staircase to the top.What is the average rate of increase of gravitational potential energy of the man? A) 630 W. B) 64 W. C) 4400 W. D) 450 W. Show Answer Correct Answer: A) 630 W. 47. A group of campers create a campfire by burning several wooden logs. Which statement best describes the energy transformations that occur when the logs burn? A) Chemical energy from the wood is converted into light and heat energy. B) Heat energy from the logs is converted into chemical and light energy. C) Chemical energy from the air is converted into mechanical and light energy. D) Heat energy from the air is converted into mechanical and light energy. Show Answer Correct Answer: A) Chemical energy from the wood is converted into light and heat energy. 48. A car with 100, 000 J of kinetic energy changes to having 500, 000 J of kinetic energy. What is the work done? A) -400, 000 J. B) +400, 000 J. C) +100, 000 J. D) +500, 000 J. Show Answer Correct Answer: B) +400, 000 J. 49. The Newton meter is the unit of A) Momentum. B) Gravitational intensity. C) Power. D) Work. Show Answer Correct Answer: D) Work. 50. What type of energy do we use to cook food? A) Radiant. B) Kinetic. C) Thermal. D) Mechanical. Show Answer Correct Answer: C) Thermal. 51. A car moves up a hill at constant speed. Which one of the following represents the workdone by the weight of the car as it moves up the hill? A) $\Delta$E$_{k}$. B) $\Delta$E$_{p}$. C) -$\Delta$E$_{p}$. D) -$\Delta$E$_{k}$. Show Answer Correct Answer: C) -$\Delta$E$_{p}$. 52. A 80 kg sprinter is running at a speed of 10 m/s. Calculate the kinetic energy of the sprinter. A) 8000 J. B) 400 J. C) 800 J. D) 4000 J. Show Answer Correct Answer: D) 4000 J. 53. Which trig function is used in the work equation? A) Sine. B) Cosine. C) Tangent. D) None of the above. Show Answer Correct Answer: B) Cosine. 54. If it takes 200N to push a box up a 10m ramp and onto the truck, how much work would it take? A) 2000J. B) 2000W. C) 20J. D) 20W. Show Answer Correct Answer: A) 2000J. 55. Consider the statements below:I Work is done on an object when a force displaces the object in the direction of the force.II Mechanical energy of a system is conserved when an external force does no work on the system.III The work done on an object by a net force is equal to the kinetic energy of the object.Which of the above statements is/are TRUE? A) Only I. B) I and II only. C) II and III only. D) I, II and III. Show Answer Correct Answer: B) I and II only. 56. The work done by a force field F=k(xi+yj) in moving a particle from (0, 0) to (1, 1) is: A) 0. B) K. C) 2k. D) 2k. Show Answer Correct Answer: C) 2k. 57. In the equation for work done, what does 'd' represent? A) Direction. B) Distance. C) Density. D) Diameter. Show Answer Correct Answer: B) Distance. 58. What is the equation for power? A) P = Work/time. B) P = Force/time. C) P = time/distance. D) P = Work * time. Show Answer Correct Answer: A) P = Work/time. 59. The total amount of energy A) Can cancel out to zero. B) Goes out into space. C) Varies. D) Remains constant. Show Answer Correct Answer: D) Remains constant. 60. What is the relationship between work and power? A) Power is the total amount of work done. B) Power is the rate of doing work. C) Power is the force applied to do work. D) Work and power are unrelated concepts. Show Answer Correct Answer: B) Power is the rate of doing work. ← 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 9 🏠 Back to Homepage 📘 Download PDF Books 📕 Premium PDF Books