This quiz works best with JavaScript enabled. Home > Class 11 > Class 11 Physics (Part I) Chapter 4 Work – Quiz 34 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Class 11 Physics (Part I) Chapter 4 Work Quiz 34 (25 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. Push or pulling forces can change an objects motion. A) True. B) False. C) All the above. D) None of the above. Show Answer Correct Answer: A) True. 2. What is a non-conservative (non-isolated) system in physics? A) A system that has no energy. B) A system that has constant energy. C) A system that may lose energy through work. D) A system that only gains energy through work. Show Answer Correct Answer: C) A system that may lose energy through work. 3. If you lift a box from the floor to a height of 1m and then carry the for for 10m, you do work only when you CARRY the box. A) True. B) False. C) All the above. D) None of the above. Show Answer Correct Answer: B) False. 4. Two balls, P and Q, are dropped simultaneously from the same height. Ball P has TWICE the mass of ball Q. Ignore the effects of air friction. Just before the balls hit the ground, the kinetic energy of ball P is x. The kinetic energy of ball Q, in terms of x, will be ..... A) $\frac{1}{4}x$. B) $\frac{1}{2}x$. C) $\frac{ }{ }x$. D) $\frac{ }{ }2x$. Show Answer Correct Answer: B) $\frac{1}{2}x$. 5. A 10 kg ball has a height of 2 m, while a 5 kg ball has a height of 5 m. Which ball has more potential energy? A) The 5 kg ball. B) The 10 kg ball. C) They both have the same potential energy. D) Impossible to predict. Show Answer Correct Answer: A) The 5 kg ball. 6. What should you always check when solving numerical problems? A) Only the time. B) Units of mass, distance, and force. C) Only the distance. D) Only the force. Show Answer Correct Answer: B) Units of mass, distance, and force. 7. A constant force on an object given by-product of force and distance moved by object in direction of force is termed as A) Work done. B) Power. C) Energy. D) None of the above. Show Answer Correct Answer: A) Work done. 8. Two workers use 100 N of force to move a sofa 2 meters in 2 seconds. How much power is required? A) 100 watts. B) 400 watts. C) 104 watts. D) 50 watts. Show Answer Correct Answer: A) 100 watts. 9. An elevator weighing 500kg is to be lifted up at a constant velocity of 0.20 m/s. The minimum horsepower of the motor (G= 9.8 m/sec) A) 2.2 HP. B) 2 HP. C) 1.5 HP. D) 1.3 HP. Show Answer Correct Answer: D) 1.3 HP. 10. The product of force and displacement of an object in motion. A) Power. B) Energy. C) Work. D) Force. Show Answer Correct Answer: C) Work. 11. Total energy T.E= A) P.E+k.E. B) Mass/Area. C) W/T. D) None of them. Show Answer Correct Answer: A) P.E+k.E. 12. Which type of reaction results in a heat flow out of the system? A) Exothermic reaction. B) Endothermic reaction. C) Combustion reaction. D) Oxidation reaction. Show Answer Correct Answer: A) Exothermic reaction. 13. If you go twice as fast, the kinetic energy becomes: A) 2 times smaller. B) 4 times smaller. C) 2 times bigger. D) 4 times bigger. Show Answer Correct Answer: D) 4 times bigger. 14. A resource that takes millions of years to form is called a ..... A) Renewable resource. B) Nonrenewable resource. C) All the above. D) None of the above. Show Answer Correct Answer: B) Nonrenewable resource. 15. A softball player catches a ball of mass m, which is moving towards her with horizontal speed V. While bringing the ball to rest, her hand moved back a distance d. Assuming constant deceleration, the horizontal force exerted on the ball by the hand is: A) $\frac{mv^2}{2d}$. B) $\frac{mv^2}{d}$. C) $\frac{2mv}{d}$. D) $\frac{mv}{d}$. Show Answer Correct Answer: A) $\frac{mv^2}{2d}$. 16. When an object is carried at a constantvelocity by a force, A) No work is done on theobject. B) The work done is maximum on theobject. C) The work is done minimum on theobject. D) The work done is 100 % on theobject. Show Answer Correct Answer: A) No work is done on theobject. 17. What effect do external forces like an applied force, friction force, or drag force have? A) They have no effect on a system's mechanical energy. B) They convert kinetic energy into potential energy. C) They convert potential energy into kinetic energy. D) They convert between mechanical energy and other forms of energy to change the total mechanical energy of the system. Show Answer Correct Answer: D) They convert between mechanical energy and other forms of energy to change the total mechanical energy of the system. 18. If the mass of an object is halved the potential energy will be A) Doubled. B) Tripled. C) Halved. D) Unchanged. Show Answer Correct Answer: C) Halved. 19. What happens to the kinetic energy of an object if its velocity is doubled? A) It quadruples. B) It doubles. C) It remains the same. D) It halves. Show Answer Correct Answer: A) It quadruples. 20. Jane, a skater who is moving at high speed needs a certain amount of force to stop her. When will more stopping force be needed with? A) Less mass. B) Less momentum. C) Less velocity. D) Less stopping time. Show Answer Correct Answer: D) Less stopping time. 21. A ball drops onto a horizontal surface and bounces elastically.What happens to the kinetic energy of the ball during the very short time that it is in contact with the surface? A) Most of the kinetic energy is lost as heat and sound. B) The kinetic energy decreases to zero and then returns to its original value. C) The kinetic energy remains constant because it is an elastic collision. D) The kinetic energy remains constant in magnitude but changes direction. Show Answer Correct Answer: B) The kinetic energy decreases to zero and then returns to its original value. 22. When a force is applied at an angle to the direction of motion, which component of the force is used to calculate work? A) The parallel component. B) The perpendicular component. C) The net force. D) Both parallel and perpendicular components. Show Answer Correct Answer: A) The parallel component. 23. In which unit is work done measured? A) Watts (W). B) Newton-metres (N m). C) Newtons (N). D) Meters (m). Show Answer Correct Answer: B) Newton-metres (N m). 24. A boy lifts a 30N dragon 2 meters above the ground. How much work did the boy do on the dragon? A) 60 J. B) 600 J. C) 15 J. D) 150 J. Show Answer Correct Answer: A) 60 J. 25. J of work is done by a person who uses a force of 50N to move a box, how far does it go? A) 10 m. B) 0.1 m. C) 25, 000 m. D) 10 J. Show Answer Correct Answer: A) 10 m. ← 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