This quiz works best with JavaScript enabled. Home > Cbse > Class 11 > Science > Physics Part I > Class 11 Physics (Part I) Chapter 4 Work – Quiz 7 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Class 11 Physics (Part I) Chapter 4 Work Quiz 7 (60 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. The force that does no work on the object is A) Applied force. B) Horizontal component of the applied force. C) Friction. D) Force of gravity. Show Answer Correct Answer: C) Friction. 2. If an object has a mass "m" and increases it's speed by 2 times, what happens to the amount of kinetic energy? A) Increases by four. B) Increases by two. C) Decreases by two. D) Decreases by four. Show Answer Correct Answer: A) Increases by four. 3. A 735 kg empty roller coaster is at its starting point whose distance from the ground is 150 m. After a while, it moves at point B whose distance from the ground is 120m. What is the kinetic energy of the coaster at point B? A) 1, 080, 450 J. B) 864, 360 J. C) 0 J. D) 216, 090 J. Show Answer Correct Answer: D) 216, 090 J. 4. True or false:a 10N force over a distance of 5m requires more work than a 20N force over a distance of 2m. A) True. B) False. C) All the above. D) None of the above. Show Answer Correct Answer: A) True. 5. Which of the following quantities is most commonly used in sports? A) Impulse. B) Force. C) Momentum. D) Velocity. Show Answer Correct Answer: C) Momentum. 6. Which of the following statements is TRUE about power? A) Power is a basic quantity. B) Power is defined as force per unit time. C) Power is a vector quantity. D) Power is the rate at which energy being transfer. Show Answer Correct Answer: D) Power is the rate at which energy being transfer. 7. Marisol and Tim both do 50, 000 Joules of work while cutting their grass. Marisol completes the task in 1200 seconds and Tim completes the task in 1500 seconds. Who has LESS power and why? A) Tim, because it took him less time. B) Marisol, because it took her less time. C) Tim, because it took him more time. D) Marisol, because it took her more time. Show Answer Correct Answer: C) Tim, because it took him more time. 8. Which type of simple machine consists of a flat, slanted surface? A) Lever. B) Inclined plane. C) Wheel and axle. D) Pulley. Show Answer Correct Answer: B) Inclined plane. 9. What are the two necessary conditions for work to be done? A) Force and Velocity. B) Force and Displacement. C) Force and Time. D) None of the above. Show Answer Correct Answer: B) Force and Displacement. 10. Which of the following quantities is/are conserved during elastic collision? A) Kinetic energy. B) Momentum. C) Both of these. D) None of these. Show Answer Correct Answer: C) Both of these. 11. To find gravitational potential energy on Earth we use which of the following equations? A) PE = m*v/g. B) PE = m*g*s. C) PE = m*v*d. D) PE = m*g*h. E) PE = m*g/h. Show Answer Correct Answer: D) PE = m*g*h. 12. The product of the net force on an object and the distance through which the object is moved A) Energy. B) Joule. C) Work. D) Power. Show Answer Correct Answer: C) Work. 13. When an object is raised to a certain height above ground, it possesses A) Kinetic energy. B) Elastic Potential Energy. C) Gravitational Potential Energy. D) None of the above. Show Answer Correct Answer: C) Gravitational Potential Energy. 14. "A gold ball rolling down the hill" . In what type of mechanical energy does it fall? A) Potential Energy. B) Kinetic Energy. C) Both. D) None of the above. Show Answer Correct Answer: B) Kinetic Energy. 15. This is the ability to do work A) Energy. B) Power. C) Force. D) None of the above. Show Answer Correct Answer: A) Energy. 16. A 500 kg roller coaster car moves at 10 m/s while it is 20 m in the air. What type(s) of energy does the car have? A) Kinetic energy. B) Gravitational potential energy. C) Spring potential energy. D) A and b. Show Answer Correct Answer: D) A and b. 17. What is the scientific definition of work? A) Force divided by displacement. B) Force multiplied by displacement. C) Force multiplied by time. D) Force plus displacement. Show Answer Correct Answer: B) Force multiplied by displacement. 18. Energy that comes from burning dead plants, organisms, and waste products is called ..... A) Geothermal energy. B) Solar energy. C) Wind energy. D) Biomass energy. Show Answer Correct Answer: D) Biomass energy. 19. If velocity of object is increased by 5 then the kinetic energy will increase by A) 10 times. B) 25 times. C) 50 times. D) 5 times. Show Answer Correct Answer: B) 25 times. 20. When positive work by an external force is done on a system, the energy of the system will ..... A) Increase. B) Decrease. C) Remain the same. D) None of the above. Show Answer Correct Answer: A) Increase. 21. Force is expressed in what? A) Newtons. B) Meters. C) Watts. D) None of the above. Show Answer Correct Answer: A) Newtons. 22. The units for power. A) Power. B) Joules. C) No choice is correct. D) Watts. E) Work. Show Answer Correct Answer: D) Watts. 23. What is the kinetic energy of a 44 kg cheetah running at 31 m/s? A) 1, 364 J. B) 21, 142 J. C) Not enough information. D) 682 J. Show Answer Correct Answer: B) 21, 142 J. 24. This is the measure of energy transferred to an object through force along a displacement. A) Kinetic Energy. B) Power. C) Potential Energy. D) Work. Show Answer Correct Answer: D) Work. 25. In Elastic collision A) Total linear momentum and kinetic enery conserved. B) Total linear momentum only conserved. C) Not obey conservation laws. D) None of these. Show Answer Correct Answer: A) Total linear momentum and kinetic enery conserved. 26. Calculate the power of an electric motor that can lift 800 kg of water to store in a tank at a height of 1500cm in 20s. (g=10m/s$^{2}$). A) 6000kW. B) 6W. C) 6kW. D) 600W. Show Answer Correct Answer: C) 6kW. 27. Power 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: A) True. 28. A car does 3000 J of work in moving a distance of 50 m. What is the average force applied? A) 60 N. B) 100 N. C) 75 N. D) 50 N. Show Answer Correct Answer: A) 60 N. 29. What form of energy is being used when a person pushes heavy boxes across the floor? A) Sound energy. B) Heat energy. C) Mechanical energy. D) Electrical energy. Show Answer Correct Answer: C) Mechanical energy. 30. Ahmad lifts a 50 kg hiking bag onto his sholuders through a vertical distance of 1.65 m in 3s. Calculate the power produced by Ahmad. A) 269.78W. B) 82.5W. C) 809.33W. D) 27.5W. Show Answer Correct Answer: A) 269.78W. 31. A spring-loaded gun shoots a plastic ball with a launch speed of 2.0 m/s. If the spring is compressed twice as far, the ball's launch speed will be: A) 16 m/s. B) 1.0 m/s. C) 4.0 m/s. D) 2.8 m/s. E) 2.0 m/s. Show Answer Correct Answer: C) 4.0 m/s. 32. These are the unit for work done except A) Joule. B) Nm$^{-2}$. C) Kg m$^{2}$ s$^{-2}$. D) Newton meter. Show Answer Correct Answer: B) Nm$^{-2}$. 33. How much time is needed to produce 720 Joules of work if 90 watts of power is used? A) 8 sec. B) 6 sec. C) 64800 sec. D) 7 sec. Show Answer Correct Answer: A) 8 sec. 34. How far will 350 J of work raise a 70 N block of chocolate? A) 5 m. B) 25 m. C) 5 W. D) 100 N. Show Answer Correct Answer: A) 5 m. 35. If a machine is lubricated with oil A) The mechanical advantage of the machine increases. B) The mechanical efficiency of machine increases. C) Both mechanical efficiency and advantage increases. D) Its efficiency increases but advantage decreases. Show Answer Correct Answer: B) The mechanical efficiency of machine increases. 36. A spring when compressed by 4 cm has 2 J energy stored in it. The force required to extend it by 8 cm will be A) 2 N. B) 2000 N. C) 20 N. D) 200 N. Show Answer Correct Answer: D) 200 N. 37. Four students are pushing on one side of a desk. Colin is pushing to the west, Zoey is pushing to the east, Will is pushing to the north, and Kylee is pushing to the south. If the desk moves to the north, which student does work on the desk? A) Colin. B) Kylee. C) Will. D) Zoey. Show Answer Correct Answer: C) Will. 38. Which situation is work not done? A) Lifting a 20 pound box off the floor. B) Holding a 20 pound box above the floor. C) Sliding a 20 pound box across the floor. D) Sliding a 20 pound box up an inclined plane. Show Answer Correct Answer: B) Holding a 20 pound box above the floor. 39. Two people push on a wall with 100 N. The wall doesn't move. How much work is done? A) 100J. B) 100N. C) 0N. D) 0J. Show Answer Correct Answer: D) 0J. 40. What is being transferred as you do work? A) Power. B) Energy. C) Gravitational Potential Energy. D) Heat. Show Answer Correct Answer: B) Energy. 41. Height and gravitational potential energy have a ..... relationship. A) Difficult. B) Inverse. C) Reverse. D) Direct. Show Answer Correct Answer: D) Direct. 42. A Mustang has more horsepower than your mom's minivan. What does this mean? A) The Mustang can do work faster. B) The Mustang will die. C) The minivan has a worse gas mileage. D) The Mustang has a higher topspeed. Show Answer Correct Answer: A) The Mustang can do work faster. 43. If a new fork lift can do the four times the amount of work in the same amount of time of an old forklift, then the new forklift is ..... A) Four time as powerful. B) Sixteen times the power. C) Of equal power of the old forklift. D) Twice as powerful. Show Answer Correct Answer: A) Four time as powerful. 44. How does mass affect kinetic energy? A) Increasing mass decreases kinetic energy. B) Mass directly affects kinetic energy; increasing mass increases kinetic energy if velocity is constant. C) Kinetic energy is only affected by velocity. D) Mass has no effect on kinetic energy. Show Answer Correct Answer: B) Mass directly affects kinetic energy; increasing mass increases kinetic energy if velocity is constant. 45. If you do 100 J of work to lift a TV up to the second floor, how much work would it take to lift the TV up to the 4th floor? A) 100 J. B) 400 J. C) 200 J. D) 300 J. Show Answer Correct Answer: D) 300 J. 46. A machine raises a load of 750N through a height of 16 min 5 s .Calculate the power at which machine works. A) 24kW. B) 2.4kW. C) 2.4KW. D) None of the above. Show Answer Correct Answer: B) 2.4kW. 47. When is work done on an object? A) When a force is applied to an object and the object remains stationary. B) When a force is applied to an object and the object moves in the same direction as the force. C) When the frictional force on an object is greater than a force applied to the object. D) When two forces of equal magnitude are applied to the object in opposite directions. Show Answer Correct Answer: B) When a force is applied to an object and the object moves in the same direction as the force. 48. A box of clothes with a mass of 55 kg has 15000 J of potential energy. What is the height of the box of clothes? A) 272.72 meters. B) 27.27 meters. C) 8250000 meters. D) 2, 727.27 meters. Show Answer Correct Answer: B) 27.27 meters. 49. What is conversion of energy takes place while charging a cell/battery A) Light energy to Chemical energy. B) Chemical energy to Electrical energy. C) Chemical energy to Light energy. D) Electrical energy to Chemical energy. Show Answer Correct Answer: D) Electrical energy to Chemical energy. 50. Kinetic energy is possessed by a body due to i A) Distance. B) State of strain. C) Its position. D) Its motion. Show Answer Correct Answer: D) Its motion. 51. Potential energy is associated with ..... A) Temperature. B) Speed. C) Position. D) Direction. Show Answer Correct Answer: C) Position. 52. If the books is carried by a force which acts at rightangles to the motion, what is the work done? A) No work is done on thebooks. B) Work done is 90J. C) Work done is maximum. D) Work done is minimum. Show Answer Correct Answer: A) No work is done on thebooks. 53. How much power is required to raise a 200-kg crate a vertical distance of 2 m in a time of 4 s? A) 1000 W. B) 4000 W. C) 1600 W. D) 400 W. Show Answer Correct Answer: A) 1000 W. 54. A girl pushes a lawn mower with a force of 50N a distance of 100m in 500s. How much power did the girl have? A) 10 W. B) 0.5 W. C) 1000 W. D) 5000 W. Show Answer Correct Answer: A) 10 W. 55. What is the difference between positive work and negative work? A) Positive work can only occur in a vacuum. B) Negative work is only done by friction. C) Positive work is always greater than negative work. D) Positive work adds energy to an object, while negative work removes energy from it. Show Answer Correct Answer: D) Positive work adds energy to an object, while negative work removes energy from it. 56. What is the formula for Kinetic Energy? A) PE = m*g*h. B) P = W/t. C) KE = 1/2*m*v2. D) W = F*d. Show Answer Correct Answer: C) KE = 1/2*m*v2. 57. A 5.5 kg cat jumps from the floor onto a table at a height of 100 cm. Determine the potential energy gained by the cat. A) 53.96 J. B) 5.4 J. C) 539.6 J. D) 5395.5 J. Show Answer Correct Answer: A) 53.96 J. 58. The unit of power A) Joule. B) Pound. C) Watt. D) Minute. Show Answer Correct Answer: C) Watt. 59. You're watching a volleyball game and someone asks you what type of energy best describe the movement of the volleyball players. Which of the following choices should your answer be in order to be correct? A) Sound. B) Potential. C) Mechanical. D) Chemical. Show Answer Correct Answer: C) Mechanical. 60. CGS unit of energy is A) Erg. B) Dyne. C) Electron volt. D) None of these. Show Answer Correct Answer: A) Erg. ← 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 8Class 11 Physics (Part I) Chapter 4 Work Quiz 9 🏠 Back to Homepage 📘 Download PDF Books 📕 Premium PDF Books