This quiz works best with JavaScript enabled. Home > Cbse > Class 9 > Science > Work And Energy > Class 9 Science Chapter 11 Work And Energy – Quiz 1 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Class 9 Science Chapter 11 Work And Energy Quiz 1 (60 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. A worker climbs a ladder and does 8 J of work on a 2 N object. What is the distance they lift the object? A) 4 m. B) 18 m. C) 10 m. D) 6 m. Show Answer Correct Answer: A) 4 m. 2. Water stored in a dam possesses ..... energy. A) Potential. B) Kinetic. C) No. D) Electrical. Show Answer Correct Answer: A) Potential. 3. Two factors that determine work are A) Size of the force, and distance. B) Size of the force, and type of force. C) Mass, and distance. D) None of the above. Show Answer Correct Answer: A) Size of the force, and distance. 4. Which of the following has potential energy? A) A roller coaster at the top of a hill. B) A rolling marble. C) A running dog. D) None of the above. Show Answer Correct Answer: A) A roller coaster at the top of a hill. 5. A particle of mass m is at rest is acted upon by a force F for a time t. Its kinetic energy after an interval of t is: A) F$^{2}$t$^{2}$/m. B) Ft/2m. C) F$^{2}$t$^{2}$/3m. D) F$^{2}$t$^{2}$/2m. Show Answer Correct Answer: D) F$^{2}$t$^{2}$/2m. 6. Food is what type of energy A) Chemical. B) Radiant. C) Mechanical. D) Thermal. Show Answer Correct Answer: A) Chemical. 7. A body is falling from a height h. After it has fallen a height h/2, it will possess A) Only potential energy. B) Only kinetic energy. C) Half potential and half kinetic energy. D) More kinetic and less potential energy. Show Answer Correct Answer: C) Half potential and half kinetic energy. 8. What is a device that makes work easier? A) Computer. B) Machine. C) Device. D) Wheelchair. Show Answer Correct Answer: B) Machine. 9. If I have a 10 kg bowling that is sitting on top of a shelf and has 200 J of GPE, how tall is the shelf? A) 2, 000 meters. B) 2 meters. C) 20, 000 meters. D) 20 meters. Show Answer Correct Answer: B) 2 meters. 10. In case of negative work, angle between force and work is- A) 0 degree. B) 45 degree. C) 180 degree. D) 90 degree. Show Answer Correct Answer: C) 180 degree. 11. An iron sphere of mass 10 kg has the same diameter as an aluminium sphere of mass is 3.5 kg. Both spheres are dropped simultaneously from a tower. When they are 10 m above the ground, they have the same A) Acceleration. B) The moment. C) Kinetic energy. D) Potential energy. Show Answer Correct Answer: A) Acceleration. 12. A man of mass 50 kg jumps to a height of 1 m. His potential energy at the highest point is(g = 10 m/s$^{2}$) A) 5000 d. B) 5 J. C) 50 J. D) 500 J. Show Answer Correct Answer: D) 500 J. 13. What is the formula for Work? A) E=mc$^{2}$. B) W= F x d. C) P = W/T. D) None of the above. Show Answer Correct Answer: B) W= F x d. 14. A satellite revolving around the earth does 0J of work ONLY because displacement at the end of one revolution is 0m A) True. B) False. C) Cannot be determined. D) None of the above. Show Answer Correct Answer: B) False. 15. A roller coaster has both kinetic and potential energy. A) True. B) False. C) All the above. D) None of the above. Show Answer Correct Answer: A) True. 16. Using the scientific definition, which statement is always true of work? A) It is difficult. B) It is done with a machine. C) It involves a transfer of energy. D) It involves levers. Show Answer Correct Answer: C) It involves a transfer of energy. 17. Which one of the following is not the unit of work? A) Joule. B) Newton metre. C) Watts. D) None. Show Answer Correct Answer: C) Watts. 18. A car is accelerated on a levelled road and attains a velocity 4 times of its initial velocity. In this process the potential energy of the car A) Becomes twice to that of initial. B) Does not change. C) Becomes 4 times that of initial. D) Becomes 16 times that of initial. Show Answer Correct Answer: B) Does not change. 19. Which formula should you use to calculate work? A) W = Fd. B) W = m + g. C) W = mg. D) W = F + d. Show Answer Correct Answer: A) W = Fd. 20. Which one of the following is the commercial unit of energy? A) Kilowatt-hour. B) Watt. C) Kilowatt. D) Watt-hour. Show Answer Correct Answer: A) Kilowatt-hour. 21. In a simple pendulum mass of bob is 100 g and effective length is L. Work done on the pendulum in one complete oscillation by gravitational force is: A) 1/4 x mgL. B) Zero. C) 1/2 x mgL. D) MgL. Show Answer Correct Answer: B) Zero. 22. The coefficient of kinetic friction between a large box and the floor is 0.21. A person pushes horizontally on the box with a force of 165 N for a distance of 2.8 m. If the mass of the box is 72 kg, what is the total work done on the box? (Round your answer to a whole number) A) 45. B) 49. C) 51. D) 47. Show Answer Correct Answer: D) 47. 23. Two army persons A and B each of weight of 500N climb up a rope through a height of 10m. A takes 20s while B takes 40s to achieve this task. what is ratio of the power of person A and B? A) 1:4. B) 2:1. C) 14:1. D) 1:2. Show Answer Correct Answer: B) 2:1. 24. A dog weighing 25 kg, while chasing a cat, jumps over a fence of height 1.6 m. What is the potential energy of dog at the top of fence?(Take 'g'=10 m s$^{-2}$ ) A) 380 Joules. B) 320 Joules. C) 160 Joules. D) 400 joules. Show Answer Correct Answer: D) 400 joules. 25. One joule work is said to be done when ..... A) A force of 1 N displaces a body by 1 m. B) A force of 1 dyne displaces a body by 1 m. C) A force of 1 dyne displaces a body by 1 cm. D) A force of 1 N displaces a body by 1 cm. Show Answer Correct Answer: A) A force of 1 N displaces a body by 1 m. 26. A boy pushes a book kept on a table by applying a force of 4.5 N. find the work done by the force, if book is displaced through 30 cm along the direction of push A) 1.10 J. B) 1.25 J. C) 1.35 J. D) None. Show Answer Correct Answer: C) 1.35 J. 27. The expression for kinetic energy ( $K_E$ A) $K_E=2^{-1}\cdot m\cdot v^2$. B) $K_E=12\cdot m\cdot g\cdot h$. C) $K_E=\frac{1}{2}\cdot m\cdot v^{ }$. D) $K_E=m\cdot g\cdot h$. Show Answer Correct Answer: A) $K_E=2^{-1}\cdot m\cdot v^2$. 28. Potential energy of a body depends on its ..... A) Position. B) Configuration. C) Position and configuration. D) Mass and velocity. Show Answer Correct Answer: C) Position and configuration. 29. What will cause greater change in kinetic energy of a body? A) Changing its mass. B) Changing its velocity. C) Neither. D) None of the above. Show Answer Correct Answer: B) Changing its velocity. 30. Energy in the form of motion. A) Mechanical energy. B) Potential energy. C) Momentum. D) Kinetic energy. Show Answer Correct Answer: D) Kinetic energy. 31. A 3 kg plate is tossed across the room with an acceleration of 13 m/s$^{2}$ in 2.5 sec. Calculate the amount of power it took to toss the plate. A) 290.5 W. B) 3000 W. C) 1267.5 W. D) 507 W. Show Answer Correct Answer: C) 1267.5 W. 32. Match the energy change with the appliances.Fans and Drills are examples of what type of energy conversion A) Electrical Energy to Mechanical. B) Electrical Energy to Thermal. C) Electrical Energy to Chemical Energy. D) Electrical Energy to Radiant Energy. Show Answer Correct Answer: A) Electrical Energy to Mechanical. 33. SI unit of power is ..... A) Newton. B) Watt. C) Meter. D) Joule. Show Answer Correct Answer: B) Watt. 34. Mechanical energy of a body includes A) Kinetic energy only. B) Potential energy only. C) Kinetic energy and potential energy. D) None of these. Show Answer Correct Answer: C) Kinetic energy and potential energy. 35. A cyclist is moving at a speed of 5 m/s on leveled road. While going down the slop, his speed increases to 7 m/s. Here the nature of work done by gravitational force in increasing the speed of cyclist is an example of? A) Zero work done. B) Infinite work done. C) Positive work done. D) Negative work done. Show Answer Correct Answer: C) Positive work done. 36. A 40 kg crate is picked up by a crane to a height of 50m. The crate falls. What is the velocity of the crate just before it hits the ground? A) 19, 600 Joules. B) 19, 600 m/s. C) 31.3 m/s. D) 2000 Joules. Show Answer Correct Answer: C) 31.3 m/s. 37. The work done on an object does not depend on the A) Displacement. B) Angle between Force and Displacement. C) Initial velocity of the object. D) Force applied. Show Answer Correct Answer: C) Initial velocity of the object. 38. Gary does 200 J of work in 10 seconds. How much power did he use? A) 2000 W. B) 20 W. C) 200 W. D) 100 W. Show Answer Correct Answer: B) 20 W. 39. When an object falls freely towards the Earth, then its total energy A) Decreases. B) First increases then decreases. C) Increases. D) Remains constant. Show Answer Correct Answer: D) Remains constant. 40. The ability to do work or cause change: A) Momentum. B) Energy. C) Work. D) Power. Show Answer Correct Answer: B) Energy. 41. A book sliding across a horizontal table slows down and comes to a stop. The book's kinetic energy was converted into what form of energy? A) Thermal energy. B) Potential energy. C) Motion energy. D) Mechanical energy. Show Answer Correct Answer: A) Thermal energy. 42. How much work is done lifting a 9.10-kg box straight up onto a shelf that is 1.80 m high? Find Force by F = Mass x Acceleration A) 160 J. B) 50 J. C) 16 J. D) 5 J. Show Answer Correct Answer: A) 160 J. 43. Match the energy change with the appliances.Toasters and Irons are examples of what type of energy conversion A) Electrical Energy to Radiant Energy. B) Electrical Energy to Thermal Energy. C) Electrical Energy to Mechanical Energy. D) Electrical Energy to Chemical Energy. Show Answer Correct Answer: B) Electrical Energy to Thermal Energy. 44. A ball has a 17 J of kinetic energy and its mechanical energy is 25 J. If the ball has a mass of 3.2 kg, what is its height above the ground? A) 0.52 m. B) 0.26 m. C) 25 m. D) 5.2 m. Show Answer Correct Answer: B) 0.26 m. 45. A mother pulls her child in a wagon 75 meters along a flat horizontal sidewalk. If she applies a force of 100-N at an angle of 60 degrees above the horizontal how much work does the mother do on the wagon? A) 7500 J. B) 6000 J. C) 15000 J. D) 3750 J. Show Answer Correct Answer: D) 3750 J. 46. An object is thrown vertically upward and it reaches to a maximum height 'h' from the ground. During its flight, on reaching 3/4 of height h, it will acquire? A) Less potential and high kinetic energy. B) More potential and less kinetic energy. C) Same potential and kinetic energy. D) Only kinetic energy. Show Answer Correct Answer: B) More potential and less kinetic energy. 47. What is the formula for calculating the total amount of mechanical energy? A) Me = the + pe. B) Pe = the + with. C) To = me + p. D) Me = 1/2 mv $^{2} $. Show Answer Correct Answer: A) Me = the + pe. 48. BONUS QUESTION:What is the mass of a 10kg object at the center of the earth? $g=10ms^{-2}$ A) 100N. B) 0kg. C) 0N. D) 10kg. Show Answer Correct Answer: D) 10kg. 49. GPE depends on gravitational acceleration and which other two things? A) Mass and Velocity. B) Velocity and Height. C) Mass and Gravity. D) Mass and Height. Show Answer Correct Answer: D) Mass and Height. 50. How much work is being done with 200 N of force over 426 meters? A) 90, 480 J. B) 62, 329 J. C) 45, 620 J. D) 85, 200 J. Show Answer Correct Answer: D) 85, 200 J. 51. In which of the following situations do your arms do work on books? A) Holding a heavy stack of books while standing. B) Dropping a stack of books onto a table. C) Picking up a pile of books from the floor. D) Carrying a heavy stack of books. Show Answer Correct Answer: C) Picking up a pile of books from the floor. 52. Units for work are A) Netons. B) Joules. C) Meters. D) Seconds. Show Answer Correct Answer: B) Joules. 53. The SI Unit for Work A) Watt (W). B) JOULE (J). C) Newton (N). D) Second (s). Show Answer Correct Answer: B) JOULE (J). 54. The form of energy possessed by the flying bird is- A) Kinetic energy. B) Potential energy. C) Potential energy and kinetic energy both. D) Wind energy. Show Answer Correct Answer: C) Potential energy and kinetic energy both. 55. Where is the kinetic energy of pendulum at its highest? A) At 1/4 of the swing. B) At 3/4 of the swing. C) At the bottom of the swing. D) At the top of the swing. Show Answer Correct Answer: C) At the bottom of the swing. 56. When you are on a swing your potential energy is greatest at the ..... point. A) Its the same at every point. B) There is no potential energy on a swing. C) Lowest. D) Highest. Show Answer Correct Answer: D) Highest. 57. Energy stored in river water is A) Chemical energy. B) Electrical energy. C) Kinetic energy. D) Potential energy. Show Answer Correct Answer: C) Kinetic energy. 58. A weight lifter moves a 45-kg dumbell from the floor to a height of 2 meters. How much work does the weight lifter do on the dumbell? A) -90 J. B) 90 J. C) 450 J. D) 900 J. Show Answer Correct Answer: D) 900 J. 59. What is mechanical energy? A) It is what metal creates when heated. B) All potential and kinetic energy in a system. C) It is motion of all matter. D) Energy of momentum. Show Answer Correct Answer: B) All potential and kinetic energy in a system. 60. A soccer player kicks a ball with 20 Newtons of force causing it to travel 100 meters. How much work is done on the ball? A) 2000 J. B) 80 J. C) 5 J. D) 200 J. Show Answer Correct Answer: A) 2000 J. Next →Related QuizzesScience QuizzesClass 9 QuizzesClass 9 Science Chapter 11 Work And Energy Quiz 2 🏠 Back to Homepage 📘 Download PDF Books 📕 Premium PDF Books