This quiz works best with JavaScript enabled. Home > Cbse > Class 11 > Science > Physics Part I > Class 11 Physics (Part I) Chapter 4 Work – Quiz 2 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Class 11 Physics (Part I) Chapter 4 Work Quiz 2 (60 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. A box of mass 8.0kg is lifted from the ground and placed on a shelf. The box gains 100 J of potential energy.The box falls off the shelf. Air resistance can be ignored. At what speed does the box hit the ground? A) 3.5 m/s. B) 5.0 m/s. C) 25 m/s. D) 28 m/s. Show Answer Correct Answer: B) 5.0 m/s. 2. What is one things that effects potential energy: A) Height. B) Speed. C) Length. D) None of the above. Show Answer Correct Answer: A) Height. 3. 25 N force is applied to a box and box moves 10m. Find the work done by the force. A) 2452.5J. B) 250J. C) 25N. D) 25.48J. Show Answer Correct Answer: B) 250J. 4. Velocity and kinetic energy have a ..... relationship. A) Diagonal. B) Inverse. C) Direct. D) Reverse. Show Answer Correct Answer: C) Direct. 5. A weight-lifter raises a 2000N weight through a vertical height of 2.0m in 0.80s. What useful power does he develop in doing this? A) 5000W. B) 700W. C) 4000W. D) 800 W. Show Answer Correct Answer: A) 5000W. 6. How do you determine the net work done on an object? A) The net work done is the sum of all work done on it by external forces. B) The net work done is the total energy consumed by the object. C) The net work done is the difference between potential and kinetic energy. D) The net work done is the work done against friction only. Show Answer Correct Answer: A) The net work done is the sum of all work done on it by external forces. 7. The unit we use to measure work is the A) Quark. B) Newton. C) Joule. D) Dyne. Show Answer Correct Answer: C) Joule. 8. Which is the type of collision in which both the linear momentum and the kinetic energy of the system remain conserved? A) Inelastic Collision. B) Elastic Collision. C) Destructive collision. D) None of these. Show Answer Correct Answer: B) Elastic Collision. 9. If a force of 10 N moves an object 5 m, how much work is done? A) 25 J. B) 50 J. C) 40 J. D) 75 J. Show Answer Correct Answer: B) 50 J. 10. Lifting an elevator 18m takes 100, 000J. If doing so takes 20s, what is the average power of the elevator during the process? A) 90, 000 W. B) 5, 000N. C) 90, 000N. D) 5, 000 W. Show Answer Correct Answer: D) 5, 000 W. 11. What is the Work-Energy Theorem in physics? A) Work is equal to the change in mechanical energy. B) Work is equal to the change in thermal energy. C) Work is equal to the change in kinetic energy. D) Work is equal to the change in potential energy. Show Answer Correct Answer: C) Work is equal to the change in kinetic energy. 12. When a long spring is stretched by $x$ $Nx$ A) $N^2U$. B) $\frac{\text{U}}{\text{N}}$. C) $UN$. D) $\frac{U}{N^3}$. Show Answer Correct Answer: A) $N^2U$. 13. A device that converts electrical energy to light energy. A) A blender. B) A light bulb. C) A bycycle. D) A balloon. Show Answer Correct Answer: B) A light bulb. 14. The SI unit for mass is the A) Watts. B) Kilograms. C) Joules. D) Newtons. Show Answer Correct Answer: B) Kilograms. 15. Which of these is a measure of force? A) 100 meters per second. B) 100 newtons. C) 100 watts. D) 100 joules. Show Answer Correct Answer: B) 100 newtons. 16. What does a negative answer for work due to friction indicate? A) Energy was taken away from the object. B) The object stopped moving. C) No change in energy. D) Energy was added to the object. Show Answer Correct Answer: A) Energy was taken away from the object. 17. What is the unit for power? A) What. B) Watt. C) Jewel-Osco. D) Joule. Show Answer Correct Answer: B) Watt. 18. What is the unit of measurement for power? A) Joule. B) Newton. C) Watt. D) None of the above. Show Answer Correct Answer: C) Watt. 19. Which of the following would result in an increase in power? A) Increase the amount of time to do work. B) Decrease the distance moved. C) Decrease the amount of work done. D) Decrease the amount of time to do work. Show Answer Correct Answer: D) Decrease the amount of time to do work. 20. How is power calculated? A) Force/time. B) Time x energy. C) Work/time. D) Energy x distance. Show Answer Correct Answer: C) Work/time. 21. A lorry and a car moving with the same K.E. are brought to rest by applying the same retarding force. then A) Lorry will come to rest in a shorter distance. B) Car will come to rest in a shorter distance. C) Both come to rest in same distance. D) None of these. Show Answer Correct Answer: C) Both come to rest in same distance. 22. When an object is at rest, not moving, what type of energy does it have? A) Potential. B) Chemical. C) Kinetic. D) Thermal. Show Answer Correct Answer: A) Potential. 23. A motor rated 100W has been operating for 150s. If the efficiency of the motor is 75%, how much work is done by the motor? A) 1125000J. B) 11250J. C) 1125J. D) 24000J. Show Answer Correct Answer: B) 11250J. 24. If the power of motor is 40 kW, at what speed does it raise a load of 20000 N A) 2m/s. B) 5m/s. C) 0.2 m/s. D) None of the above. Show Answer Correct Answer: A) 2m/s. 25. A car moves 3 times as fast as another car. Compared to the slower car, the faster car has ..... A) 3 times the kinetic energy. B) 12 times the kinetic energy. C) 6 times the kinetic energy. D) 9 times the kinetic energy. Show Answer Correct Answer: D) 9 times the kinetic energy. 26. Abby has a mass of 50 kg and is going for a run. If her speed changes from 5 m/s to 7.5 m/s, what is work done on Abby? A) 312.5 J. B) 781.25. C) 62.5 J. D) 125 J. Show Answer Correct Answer: B) 781.25. 27. Gravitational potential energy is defined as A) The energy an object has due to its height above the ground. B) The energy an object has due to its motion. C) The energy a spring has due to its stretch. D) The chemical energy stored in the molecules of atoms. Show Answer Correct Answer: A) The energy an object has due to its height above the ground. 28. Describe a scenario where work is done but no energy is transferred. A) A balloon floating in the air. B) A person pushing against a stationary wall. C) A person lifting a heavy box. D) A car driving on a highway. Show Answer Correct Answer: B) A person pushing against a stationary wall. 29. Which of the following is the correct formula for calculating power? A) $P = mgh$. B) $P = F\cdot d$. C) $P = \frac{W}{t}$. D) $P = \frac{1}{2}mv^2$. Show Answer Correct Answer: C) $P = \frac{W}{t}$. 30. A toy train with a mass of 12 kg is moving with a velocity of 7 m/s. How much kinetic energy does the train have? A) 294 J. B) 84 J. C) 42 J. D) 588 J. Show Answer Correct Answer: A) 294 J. 31. If a group of workers can apply a force of 1, 000 Newtons to move a crate 20 meters, what amount of work will they have accomplished? A) 20 J. B) 20, 000 J. C) 2, 000 J. D) 200 J. Show Answer Correct Answer: B) 20, 000 J. 32. A 10 gram ball is held 2 meters from the ground. How much energy does it have? A) .2 J. B) 20 J. C) 0 J. D) 2 J. Show Answer Correct Answer: A) .2 J. 33. It takes 6.0 seconds for a pulley system to lift a crate weighing 300. N to a height of 5.0 meters. How much power is required to lift the crate? A) 10 W. B) 360 W. C) 0.1 W. D) 250 W. Show Answer Correct Answer: D) 250 W. 34. What would 1m be an example of? A) Distance. B) Work. C) Time. D) Power. Show Answer Correct Answer: A) Distance. 35. The unit of power (aka Joule per second) A) Watt. B) Joule. C) Minute. D) Pound. Show Answer Correct Answer: A) Watt. 36. Large man:Fw=1000N, time = 5 secondsSmall child:Fw=400N, time = 1 secondBoth people walked up the same set of steps (1 m). Who did the most work? A) Large man because he weighs more. B) Small child because she weighs less. C) Large man because he took more time. D) Small child because she took less time. Show Answer Correct Answer: A) Large man because he weighs more. 37. In which of the situations is NO work being done? A) Lifting a box from the ground to a table top. B) Pushing a box across the floor. C) Holding a box overhead. D) Carrying a box up a flight of stairs. Show Answer Correct Answer: C) Holding a box overhead. 38. A table tennis ball has a mass of 2.45g (convert this to kg). Suppose the ball is hit across the table with a speed of 4.0m/s. What is its kinetic energy? A) 1919.6 J. B) 0.0196 J. C) 0.049 J. D) 4.9 J. Show Answer Correct Answer: B) 0.0196 J. 39. Work done by friction A) Decreases potential energy of body. B) Increases kinetic energy of body. C) Decreases kinetic energy of body. D) Increases potential energy of body. Show Answer Correct Answer: C) Decreases kinetic energy of body. 40. Two horses pull a cart. Each exerts a force of 250.0 N at a speed of 2.0 m/s for 10.0 min. Calculate the power delivered by the horses? A) 1 kW. B) 0.5 kW. C) 10 kW. D) 5 kW. Show Answer Correct Answer: A) 1 kW. 41. When an object is carried at a constantvelocity, A) The work done is 100 % on theobject. B) The work done is maximum on theobject. C) The work is done minimum on theobject. D) No work is done on theobject. Show Answer Correct Answer: D) No work is done on theobject. 42. What is the kinetic energy of a 9.2kg book that has a speed of 5.5m/s? A) 9.2J. B) .5J. C) 139.2J. D) 25J. Show Answer Correct Answer: C) 139.2J. 43. Jake's toy truck has a mass of 3 kilograms (kg). Jake pushes the truck with a force of 10 newtons (N). How much work has Jake done on the truck when he pushes it for 2 meters? A) 20 J. B) 30 J. C) 5 J. D) 60 J. Show Answer Correct Answer: A) 20 J. 44. Which of the following is an example of negative work? A) Lifting a box. B) Ball falling down. C) Car braking. D) Water turbine spinning. Show Answer Correct Answer: C) Car braking. 45. Aaron pulls on the handle of the locked classroom door but fails to open it. Is this an example of positive, negative or zero being done on the wall? A) Positive. B) Negative. C) Zero. D) None of the above. Show Answer Correct Answer: C) Zero. 46. If a body of mass m collides head on, elastically with velocity u with another identical body at rest. After collision velocity of the second body will be A) 2u. B) U. C) Data insufficient. D) Zero. Show Answer Correct Answer: B) U. 47. Describe a real-life example of kinetic energy. A) A sleeping dog. B) A moving car. C) A parked bicycle. D) A stationary rock. Show Answer Correct Answer: B) A moving car. 48. An ideal spring with spring-constant k is hung from the ceiling and a block of mass M is attached to its lower end. The mass is released with the spring is initially upstretched. Then the maximum extension in the spring is A) $\frac{2Mg}{k}$. B) $\frac{Mg}{k}$. C) $\frac{4Mg}{k}$. D) $\frac{Mg}{2k}$. Show Answer Correct Answer: A) $\frac{2Mg}{k}$. 49. An object of mass 4.5 kg is travelling at 7.0 m / s. How much kinetic energy does the object have? A) 16 J. B) 32 J. C) 110 J. D) 220 J. Show Answer Correct Answer: C) 110 J. 50. A bulldozer does 30, 000 J of work over a distance of 20 meters. How much force did it apply? A) 2000 N. B) 1000 N. C) 1500 N. D) 2500 N. Show Answer Correct Answer: C) 1500 N. 51. How are different forms of energy related? A) They can all be transformed into other forms of energy. B) None of them can be transformed into other forms of energy. C) They can be created. D) They can be destroyed. Show Answer Correct Answer: A) They can all be transformed into other forms of energy. 52. If a 1300 kg car has been lifted so it has 19500 J of potential energy, what is the height of the car which it been lifted up? A) 150 m. B) 15 m. C) 0.67 m. D) 1.5 m. Show Answer Correct Answer: D) 1.5 m. 53. If you lift a box that is twice as heavy as your friend you are doing A) Cannot be determined. B) Two times more work than your friend. C) The same amount of work. D) Half as much work as your friend. Show Answer Correct Answer: B) Two times more work than your friend. 54. A student with a mass of 66.0 kg climbs a staircase in 44.0 s. If the distance between the base and the top of the staircase is 14.0 m, how much power will the student deliver by climbing the stairs? (Use g = 9.8 m/s$^{2}$.) A) 124 W. B) 206 W. C) 21 W. D) 36 W. Show Answer Correct Answer: B) 206 W. 55. What is the kinetic energy of a 210 kg motor while traveling at a speed of 90 km/h? A) 65.63 kJ. B) 850.50 kJ. C) 2.63 kJ. D) 9.45 kJ. Show Answer Correct Answer: A) 65.63 kJ. 56. In which one of the following situations is zero net work done? A) A ball rolls down an inclined plane. B) A physics student stretches a spring. C) A projectile fall towards the surface of Earth. D) A box is pulled across a rough floor at constant velocity. Show Answer Correct Answer: D) A box is pulled across a rough floor at constant velocity. 57. A 3 kg ball rolls across the floor at 2 m/s, how much kinetic energy does it have? A) Not enough information is provided. B) 3 J. C) 12 J. D) 6 J. Show Answer Correct Answer: D) 6 J. 58. When you release a stretched rubber band, the rubber band has ..... energy. A) Kinetic. B) Potential. C) None of the above. D) All of the above. Show Answer Correct Answer: A) Kinetic. 59. What happens to kinetic energy as an object falls? A) Kinetic energy is irrelevant to falling objects. B) Kinetic energy increases as an object falls. C) Kinetic energy decreases as an object falls. D) Kinetic energy remains constant as an object falls. Show Answer Correct Answer: B) Kinetic energy increases as an object falls. 60. When you climb a ladder to the top of a slide, what energy do you gain? A) Potential energy. B) Kinetic energy. C) Sound energy. D) Heat energy. Show Answer Correct Answer: A) Potential energy. ← PreviousNext →Related QuizzesScience QuizzesClass 11 QuizzesClass 11 Physics (Part I) Chapter 4 Work Quiz 1Class 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 9 🏠 Back to Homepage 📘 Download PDF Books 📕 Premium PDF Books