This quiz works best with JavaScript enabled. Home > Class 11 > Class 11 Physics (Part I) Chapter 4 Work – Quiz 33 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Class 11 Physics (Part I) Chapter 4 Work Quiz 33 (25 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. A man carries 20 tiles from the ground to the roof of a house. Each tile has a mass of 1.2 kg. The roof of the house is 15 m above the ground.How much work does the man do against gravity on the tiles in carrying them to the roof? A) 36 J. B) 180 J. C) 360 J. D) 3600 J. Show Answer Correct Answer: D) 3600 J. 2. The change in position relative to another object A) Work. B) Force. C) Motion. D) Power. Show Answer Correct Answer: C) Motion. 3. Nearing the end of the shockwave ride, a braking system exerts an applied force upon the coaster car to bring it to a stop. Determine the type of work done of the applied force? A) Maximum Work. B) Negative Work. C) Positive Work. D) Zero Work. Show Answer Correct Answer: B) Negative Work. 4. When force and displacement are in the same direction, the work done on the object is ..... A) Positive. B) Negative. C) It depends on the problem. D) Neither, we are concerned with magnitude only. Show Answer Correct Answer: A) Positive. 5. What is the relationship between maximum kinetic energy and maximum potential energy in a conservative (isolated) system? A) Kinetic energy is always greater than potential energy. B) Potential energy is always greater than kinetic energy. C) They are independent of each other. D) They are equal at any given point. Show Answer Correct Answer: D) They are equal at any given point. 6. A shot is fired at 30$^\circ$ with the vertical from a point on the ground with kinetic energy K. If air resistance is ignored, the kinetic energy at the top of the trajectory is A) 3K/2. B) K/2. C) K. D) K/4. Show Answer Correct Answer: D) K/4. 7. Gravitational potential energy of an object is dependent on A) 1 the volume of the object. B) 2 the mass and height of the object. C) 3 the mass & speed of the object. D) 4 the velocity of the object. Show Answer Correct Answer: B) 2 the mass and height of the object. 8. How does conservation of energy explain why something that is falling should speed up? A) It gains kinetic energy because it gains potential energy. B) It loses kinetic energy because no work was done on it. C) It gains kinetic energy because it loses potential energy. D) It loses kinetic energy because the Earth gains potential energy. Show Answer Correct Answer: C) It gains kinetic energy because it loses potential energy. 9. It takes 545 J to operate a TV for 1 min. How much power is need to to operate the TV for this time period? A) 545 W. B) 9.1 W. C) 32700 W. D) 0.1 W. Show Answer Correct Answer: B) 9.1 W. 10. A body is falling freely under the action of gravity alone in vacuum. Which of the following quantities remain constant during the fall? A) Total Kinetic Energy. B) Total Potential Energy. C) Total gravitational Energy. D) Total Mechanical Energy. Show Answer Correct Answer: D) Total Mechanical Energy. 11. Explain how energy can be transformed from one form to another. A) Energy can only exist in one form at a time. B) Energy transformation is impossible in closed systems. C) Energy can only be created, not transformed. D) Energy can be transformed from potential to kinetic to mechanical to electrical energy. Show Answer Correct Answer: D) Energy can be transformed from potential to kinetic to mechanical to electrical energy. 12. The efficiency of a machine is 80%, and it delivers 400 W of power. What is the input power? A) 500 W. B) 320 W. C) 800 W. D) 480 W. Show Answer Correct Answer: A) 500 W. 13. An object falls from the top of a building that is 25 m high. Air resistance is negligible. What is the speed of the object when it hits the ground? A) 10 m/s. B) 22 m/s. C) 25 m/s. D) 625 m/s. Show Answer Correct Answer: B) 22 m/s. 14. What is the kinetic energy of a 3 kg toy car with a velocity of 4 m/s? A) 48 J. B) 24 J. C) 6 J. D) 12 J. Show Answer Correct Answer: B) 24 J. 15. "A leaf falling down from the tree" . 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. 16. How much work is done in moving 2 columns of charge across two points having a potential difference of 12V A) 6 Joule. B) 18 Joule. C) 24 Joule. D) 12 Joule. Show Answer Correct Answer: C) 24 Joule. 17. . A force of 2 N acts parallel to the displacement of a particle for a distance of 10 m. What is the change in the kinetic energy of the particle? A) 5J. B) 20J. C) 10J. D) None of the above. Show Answer Correct Answer: B) 20J. 18. Terri has a mass of 85 kg and is standing on a diving board that is 8 meters high. How much gravitational potential energy does she have? A) 106.25 J. B) 6800 J. C) 68 J. D) 54, 400 J. Show Answer Correct Answer: B) 6800 J. 19. Which one of the following is incorrect? Wnc is ..... A) Equal to $\Delta$Ek. B) Equal to the change in mechanical energy of an object. C) The total work done by a sum of non-conservative forces. D) A sum of works. Show Answer Correct Answer: B) Equal to the change in mechanical energy of an object. 20. Which of the following are required in order to have kinetic energy? A) Height. B) Time. C) Acceleration. D) Speed or velocity. Show Answer Correct Answer: D) Speed or velocity. 21. TRUE or FALSE:POTENTIAL Energy is the form of energy that an object has when in motion. A) TRUE. B) FALSE. C) All the above. D) None of the above. Show Answer Correct Answer: B) FALSE. 22. Which of the following would NEVER happen in a perfectly inelastic collision? A) Objects move in opposite directions. B) Objects stick together after collision. C) Objects are deformed to some degree. D) Objects move with a common velocity. Show Answer Correct Answer: A) Objects move in opposite directions. 23. If you want to double the gravitational potential energy of an object near the Earth's surface, what should you do? A) Double the object's mass. B) Double the object's height. C) Double the acceleration due to gravity. D) Double the object's speed. Show Answer Correct Answer: B) Double the object's height. 24. A 50.0 kg student climbs 5.00 m up a rope at a constant speed. If the student's power output is 200.0 W, how long does it take the student to climbs the rope? (Use g = 9.8 m/s$^{2}$.) A) 1.25 s. B) 3.64 s. C) 12.25 s. D) 24.5 s. Show Answer Correct Answer: C) 12.25 s. 25. What is the definition of work in physics? A) Measuring the temperature of a system. B) Solving equations in physics. C) Writing reports in a physics lab. D) Applying force over a distance to a system. Show Answer Correct Answer: D) Applying force over a distance to a system. ← 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