This quiz works best with JavaScript enabled. Home > Class 11 > Class 11 Physics (Part I) Chapter 4 Work – Quiz 35 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Class 11 Physics (Part I) Chapter 4 Work Quiz 35 (25 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. A toy plane has a potential energy of 100 J. If the height decreases by a factor of 4, what is the new potential energy? A) 25 J. B) 400 J. C) 1600 J. D) 6.25 J. Show Answer Correct Answer: A) 25 J. 2. ..... is defined as the rate at which work is done. A) Efficiency. B) Power. C) Work. D) Kinetic Energy. Show Answer Correct Answer: B) Power. 3. A frisbee has 100 J of kinetic energy. If its speed decreases by a factor of 9, then what is the new kinetic energy? A) 8100 J. B) 900 J. C) 11.11 J. D) 1.23 J. Show Answer Correct Answer: D) 1.23 J. 4. As a falling apple approaches the ground, its kinetic energy A) Increases. B) Decreases. C) Stays the same. D) None of the above. Show Answer Correct Answer: A) Increases. 5. A lift in a hotel can raise 8 people through a height of 20 m in 5 seconds. The lift plus passengers has a mass of 800 kg. What is the power of the lift motor? A) 40 W. B) 8 000 W. C) 40 000 W. D) 32 000 W. E) 160 000 W. Show Answer Correct Answer: D) 32 000 W. 6. Standard unit for Power A) Ampere. B) Newton. C) Joule. D) Watt. Show Answer Correct Answer: D) Watt. 7. The equation for WORK is A) Work = power x mass. B) Work = power / time. C) Work = force x distance. D) Work = distance x time. Show Answer Correct Answer: C) Work = force x distance. 8. When negative work (by friction or external forces) is done on a system, the total mechanical energy will ..... A) Increase. B) Decrease. C) Remain the same. D) None of the above. Show Answer Correct Answer: B) Decrease. 9. A 1.5 m high person is holding a 20 kg trunk on his head and is standing at a roadways bus-terminal. How much work is done by the person? A) 9J. B) 8J. C) 0J. D) 13J. Show Answer Correct Answer: C) 0J. 10. Work is measured in A) Joules. B) Newtons. C) Watts. D) Watts Joules. Show Answer Correct Answer: A) Joules. 11. An 80 N rope tension force is used to slowly pull a wagon 50 m up a hill. Calculate the work done by the rope if it pulls parallel to the hill A) 2000 J. B) 4000 J. C) 6000 J. D) None of the above. Show Answer Correct Answer: B) 4000 J. 12. The ability to do work is A) Power. B) Energy. C) Thermal. D) Kinetic. Show Answer Correct Answer: B) Energy. 13. Which energy resource stores kinetic energy? A) Nuclear. B) Wind. C) Coal. D) Solar. Show Answer Correct Answer: B) Wind. 14. A machine is very efficient. What does this mean? A) It produces a large amount of power. B) It uses very little energy. C) It wastes very little energy. D) It works very quickly. Show Answer Correct Answer: C) It wastes very little energy. 15. Which of the following about mass and weight is true? A) Weight is independent of gravity while mass is dependent of gravity. B) Mass is independent of gravity while weight is dependent of gravity. C) Both are independent of gravity. D) Both are dependent of gravity. Show Answer Correct Answer: B) Mass is independent of gravity while weight is dependent of gravity. 16. Food is a form of this type of energy. A) Light energy. B) Chemical energy. C) Sound energy. D) Thermal energy. Show Answer Correct Answer: B) Chemical energy. 17. What is the unit for work? A) Joules. B) Newton. C) Watts. D) None of the above. Show Answer Correct Answer: A) Joules. 18. Which statement illustrates work done? A) A weightlifter holds a barbell above her head. B) A teacher applies a force to a wall and becomes exhausted. C) A rolling marble hits a note card and moves it across a table. D) A waiter carries a tray full of meals across a dining room at a constant speed. Show Answer Correct Answer: C) A rolling marble hits a note card and moves it across a table. 19. Rate of doing work is called A) Energy. B) Torque. C) Momentum. D) Power. Show Answer Correct Answer: D) Power. 20. When comparing two electric motors lifting the same weight: A) The faster motor uses less energy. B) The faster motor has more power. C) The faster motor applies less force. D) The faster motor does less work. Show Answer Correct Answer: B) The faster motor has more power. 21. Kinetic energy is proportional to A) V2. B) V. C) Work. D) None of the above. Show Answer Correct Answer: A) V2. 22. A particle is moving in a straight line under the action of a variable force F=2x+3. What is the work done by the force in moving the particle from x=0 to x=4? A) 24 J. B) 28 J. C) 32 J. D) 40 J. Show Answer Correct Answer: B) 28 J. 23. What is the renewable source that produces energy from the movement of flowing water? A) Hydroelectric. B) Solar. C) Geothermal. D) Biomass. Show Answer Correct Answer: A) Hydroelectric. 24. In which of the following scenarios is work being done, according to the physics definition? A) Solving an equation. B) Lifting up a book. C) Holding a barbell above your head. D) Keeping a bike from falling as it rolls along a sidewalk. Show Answer Correct Answer: B) Lifting up a book. 25. What is the formula for calculating kinetic energy? A) $KE = \frac{1}{2}mv^2$. B) $KE = mv^2$. C) $KE = \frac{1}{2}mv$. D) $KE = mgh$. Show Answer Correct Answer: A) $KE = \frac{1}{2}mv^2$. ← PreviousNext →Related 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 8Class 11 Physics (Part I) Chapter 4 Work Quiz 9Class 11 Physics (Part I) Chapter 4 Work Quiz 10 🏠 Back to Homepage 📘 Download PDF Books 📕 Premium PDF Books