This quiz works best with JavaScript enabled. Home > Cbse > Class 11 > Science > Physics Part I > Class 11 Physics (Part I) Chapter 4 Work – Quiz 16 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Class 11 Physics (Part I) Chapter 4 Work Quiz 16 (60 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. A large stone raised to the top of a hill is known to have this type of energy ..... A) Kinetic Energy. B) Elastic Potential Energy. C) Gravitational Potential Energy. D) Chemical Energy. Show Answer Correct Answer: C) Gravitational Potential Energy. 2. A person trying to lose weight by burning fat lifts a mass of 10 kg up to a height of 1 m 1000 times. Assume that the potential energy lost each time he lowers the mass is dissipated. How much fat will he use up considering the work done only when the weight is lifted up? Fat supplies $3.8X10^7J$ $9.8m/s^2$ A) $12.89X10^{-3}kg$. B) $6.45X10^{-3}kg$. C) $2.45X10^{-3}kg$. D) $9.89X10^{-3}kg$. Show Answer Correct Answer: A) $12.89X10^{-3}kg$. 3. A force 6i-2j act on a body the give a work done of 16Jand the angle between the Force and the distance is 36.9$^\circ$. The magnitude of the distance is A) -2m. B) 3.2m. C) 3.8m. D) 4m. Show Answer Correct Answer: B) 3.2m. 4. What is the sign of the work done by gravity on a man standing on a platform? A) Zero. B) Positive. C) Negative. D) None of the above. Show Answer Correct Answer: A) Zero. 5. The Law of Conservation of Energy states that total amount of energy in a closed system will always A) Stay the same. B) Decrease. C) Cannot be determined. D) Increase. Show Answer Correct Answer: A) Stay the same. 6. A moving car hits an identical car at rest and move together afterwards. What can be concluded about the velocity of the first car before the collision as compared to the velocity of the combined cars after the collision? A) Larger. B) Smaller. C) The same. D) Zero. Show Answer Correct Answer: A) Larger. 7. Work is NOT done when ..... A) A boy pushes on a parked car. B) A girl lifts a book off the floor. C) A man pushes a box across the carpet. D) Friction causes a ball to stop rolling. Show Answer Correct Answer: A) A boy pushes on a parked car. 8. Power is defined as the quantity that measures the rate at which ..... is done or energy is transformed. A) Elasticity. B) Time. C) Energy. D) Work. Show Answer Correct Answer: D) Work. 9. Force is a ..... or ..... A) Up down. B) In out. C) Push pull. D) Simple complex. Show Answer Correct Answer: C) Push pull. 10. As an object is lowered into a deep hole in the surface of the Earth, which of the following must be assumed with regard to its potential energy? A) It increases. B) One cannot tell. C) It decreases. D) It remains constant. Show Answer Correct Answer: C) It decreases. 11. Which of the following is not a unit of energy? A) Watt-hour. B) Newton-meter. C) Ampere. D) Joule. Show Answer Correct Answer: C) Ampere. 12. What is the relationship between kinetic energy and velocity? A) Kinetic energy is inversely proportional to velocity. B) Kinetic energy is inversely proportional to the square of velocity. C) Kinetic energy is directly proportional to the square of velocity. D) Kinetic energy is directly proportional to velocity. Show Answer Correct Answer: C) Kinetic energy is directly proportional to the square of velocity. 13. Watt hour meter used to measure- A) Power. B) Voltage. C) Wattage. D) Energy. Show Answer Correct Answer: D) Energy. 14. Explain the work-energy theorem in your own words. A) The work-energy theorem only applies to objects at rest. B) The work-energy theorem states that energy cannot be created or destroyed. C) The work-energy theorem relates the work done on an object to its change in kinetic energy. D) The work-energy theorem describes the relationship between potential energy and temperature. Show Answer Correct Answer: C) The work-energy theorem relates the work done on an object to its change in kinetic energy. 15. How much work is done if a boy pulls a sled 2 m with a force of 20 N? A) 22 J. B) 12 J. C) 40 J. D) 10 J. Show Answer Correct Answer: C) 40 J. 16. Energy is the rate at which work is done A) True. B) False. C) All the above. D) None of the above. Show Answer Correct Answer: B) False. 17. What is the standard unit used to express work? A) Joule. B) Newton. C) Watt. D) None of the above. Show Answer Correct Answer: A) Joule. 18. Saul and Martin both do 100, 000 J of work when jogging. Saul does it in 80 seconds and Martin does it in 75 seconds. Who has more power and why? A) Martin, because he does it in less time. B) Saul, because he does it in more time. C) Martin, because he does it in more time. D) Saul, because he does it in less time. Show Answer Correct Answer: A) Martin, because he does it in less time. 19. You do work when you glide (not pushing) across the ice while ice skating. A) True. B) False. C) All the above. D) None of the above. Show Answer Correct Answer: B) False. 20. Energy is measured in: A) Watts. B) Newtons. C) Joules. D) Volts. Show Answer Correct Answer: C) Joules. 21. ..... is the rate at which work is done A) Energy. B) Power. C) Time. D) Force. Show Answer Correct Answer: B) Power. 22. The application of a force that causes the body to move in the direction of the force is called A) Energy. B) Efficiency. C) Work. D) Power. Show Answer Correct Answer: C) Work. 23. When force is 5 N and displacement is 20 m. what is the work done? A) 100 J. B) 100 N. C) 10 Nm. D) Both A and B. Show Answer Correct Answer: A) 100 J. 24. Rohan, Aiden, and Lily are playing with a ball on a hill. The energy stored in the ball due to its position on the hill is called A) Kinetic energy. B) Potential energy. C) Work. D) Power. Show Answer Correct Answer: B) Potential energy. 25. Which of the following is the S.I. unit for Power? A) Watts. B) Joules. C) Newtons. D) None of the above. Show Answer Correct Answer: A) Watts. 26. Joey pushes a box horizontally for 2 m with a horizontal force of 10N. How much work did he do? A) 5 J. B) 0 J. C) 20 J. D) 10 J. Show Answer Correct Answer: C) 20 J. 27. The SI unit for power A) Newtons. B) Watts. C) Meters. D) Joules. Show Answer Correct Answer: B) Watts. 28. A machine rated as 150W, changes the velocity of a 10 kg mass from 4 ms$^{-1}$ to 10 ms$^{-1}$ in 4s. The efficiency of the machine nearly is A) 40%. B) 50%. C) 70%. D) 30%. Show Answer Correct Answer: C) 70%. 29. A ball of mass 500g was moved from A to B. The total work done in moving the Ball from A to B was 5J . If at B the ball moves with a speed of 5.7m/s. What's the speed at which the ball moves initially at A. A) 3.48m/s. B) 2.54m/s. C) 5.64m/s. D) 6.89m/s. Show Answer Correct Answer: A) 3.48m/s. 30. The work done in accelerating an object along horizontal surface is equal to the object's change in ..... A) Potential energy. B) Velocity. C) Momentum. D) Kinetic energy. Show Answer Correct Answer: D) Kinetic energy. 31. E largest land predator is the male polar bear, which typically has a mass of around 500kg. If the maximum kinetic energy for a polar bear with this mass is 60500J, what is its top speed? A) 1.55 m/s. B) 15.5 m/s. C) 242 m/s. D) 121 m/s. Show Answer Correct Answer: B) 15.5 m/s. 32. Define work done in the context of physics. A) Work done is the sum of energy and time taken. B) Work done is the difference between potential and kinetic energy. C) Work done is the product of force and distance in the direction of the force. D) Work done is the total mass multiplied by speed. Show Answer Correct Answer: C) Work done is the product of force and distance in the direction of the force. 33. Kinetic energy increase if velocity increases A) True. B) False. C) All the above. D) None of the above. Show Answer Correct Answer: A) True. 34. A body at rest breaks into two pieces of equal masses. The parts will move A) In opposite directions with equal speeds. B) In opposite directions with unequal speeds. C) In same direction. D) Along different lines. Show Answer Correct Answer: A) In opposite directions with equal speeds. 35. The "power" of a machine measures ..... A) The work it does. B) The rate of doing work. C) Its strength. D) The force it produces. Show Answer Correct Answer: B) The rate of doing work. 36. What is the energy of motion? A) Kinetic. B) Potential. C) Chemical. D) Gravitational. Show Answer Correct Answer: A) Kinetic. 37. A wind powered generator converts wind energy into electrical energy. Assume that the generator converts a fixed fraction of the wind energy intercepted by its blades, into electrical energy. For wind speed v, the electrical power output will be proportional to A) V$^{3}$. B) V. C) V$^{2}$. D) V$^{4}$. Show Answer Correct Answer: A) V$^{3}$. 38. The Atlantic torpedo is a large electric fish capable of generating a voltage of 220V between its tail and its head. This drives a pulse of current of 15A lasting for a time of 2.0 ms. The fish produces 200 pulses per second.What is the average power output of the fish? A) 33W. B) 6.6kW. C) 1.3kW. D) 3.3kW. Show Answer Correct Answer: C) 1.3kW. 39. Name one unit of power bigger than watt. A) Kilowatt-hour. B) Joule. C) Kilowatt. D) Erg. Show Answer Correct Answer: C) Kilowatt. 40. A 5000N block is lifted 10 m. How much work was done? A) 500 J. B) 5000 J. C) 50 J. D) 50000 J. Show Answer Correct Answer: D) 50000 J. 41. All of the following are an example of light energy except for: A) Fire. B) Flashlight. C) Apple. D) Sun. Show Answer Correct Answer: C) Apple. 42. You do 40 Joules of work in 8 seconds. How much power did you exert? A) 0.2 watts. B) 320 watts. C) 5 watts. D) None of the above. Show Answer Correct Answer: C) 5 watts. 43. A bungee jumper jumps from a platform and is decelerated by an elastic bungee cord, as shown.At which part of the jump are all three types of energy non-zero? A) On the way down as he decelerates. B) On the way down before the cord has started to extend. C) At the bottom of the jump when the is stationary. D) On the platform before the jump. Show Answer Correct Answer: A) On the way down as he decelerates. 44. Energy is the capacity to do work. There are different forms of energy. What is the example of Potential Energy? A) Holding a weight above the head. B) Speed of sprint runner. C) Stretching spring weights. D) Holding a weight below the head. Show Answer Correct Answer: A) Holding a weight above the head. 45. A system that does not exchange energy or matter with the environment A) Right system. B) Left system. C) Open system. D) Closed system. Show Answer Correct Answer: D) Closed system. 46. Power is a vector quantity . A) True. B) False. C) All the above. D) None of the above. Show Answer Correct Answer: B) False. 47. S.I unit for energy is A) Joule. B) Watt. C) Newton. D) None of the above. Show Answer Correct Answer: A) Joule. 48. Energy that is stored in a battery is called ..... A) Radiant. B) Work energy. C) Chemical energy. D) Thermal energy. Show Answer Correct Answer: C) Chemical energy. 49. A time-dependent force F = 6t acts on a particle of mass 1 kg. If the particle starts from rest, the work done by the force during the first 1 sec. will be: A) 9 J. B) 22 J. C) 4.5 J. D) 18 J. Show Answer Correct Answer: C) 4.5 J. 50. What is the kinetic energy of a 10 kg ball moving at 3 m/s? A) 45 J. B) 15 J. C) 90 J. D) 30 J. Show Answer Correct Answer: A) 45 J. 51. What is the form of energy contained within a system because of the position or arrangement of its components? A) Kinetic energy. B) Potential energy. C) Chemical energy. D) Thermal energy. Show Answer Correct Answer: B) Potential energy. 52. A skateboarder exerts a force of 120 N and travels 300m. How much work is done? A) 36000 J. B) 36000 N. C) 2, 5 N. D) 2, 5 J. Show Answer Correct Answer: A) 36000 J. 53. 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, power. B) Work, energy. C) Power, work. D) Force, work. Show Answer Correct Answer: A) Work, power. 54. An object falls under gravity. What happens to the gravitational potential energy and to the kinetic energy of the object? A) Decreases, decreases. B) Increases, decreases. C) Decreases, increases. D) Increases, increases. Show Answer Correct Answer: C) Decreases, increases. 55. 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. 56. The amount of work done in a certain amount of time is known as A) Work. B) Resistance force. C) Power. D) Effort force. Show Answer Correct Answer: C) Power. 57. 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. 58. What is the rate at which work is done? A) Work. B) Power. C) Joule. D) Energy. Show Answer Correct Answer: B) Power. 59. Time rate at which work is done or energy is transferred A) Average power of a force. B) Average work of a force. C) Average work of power. D) Average force of power. Show Answer Correct Answer: D) Average force of power. 60. 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) Kinetic energy, Potential energy. C) Energy, potential energy. D) Kinetic energy, energy. Show Answer Correct Answer: A) Energy, kinetic energy. ← 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