This quiz works best with JavaScript enabled. Home > Class 11 > Class 11 Physics (Part I) Chapter 4 Work – Quiz 15 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Class 11 Physics (Part I) Chapter 4 Work Quiz 15 (25 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. What is the formula for finding gravitational potential energy GPE? A) Mgh. B) $\frac{1}{2}mv^2$. C) Fd. D) D/t. Show Answer Correct Answer: A) Mgh. 2. An Xbox consumes 15.7 watts while in standby mode. If you leave it in standby mode for 86, 400 seconds (one day), how much work was done? A) 1, 356, 490 J. B) 1, 356, 480 J. C) 1, 356, 470 J. D) 1, 356, 460 J. Show Answer Correct Answer: B) 1, 356, 480 J. 3. A 35 kg chair is lifted 5 m off the ground. What is its potential energy? A) 175 J. B) 30 J. C) 1715 J. D) 40 J. Show Answer Correct Answer: C) 1715 J. 4. A ball moves on a frictionless inclined table without slipping. The work done by the table surface on the ball is A) Positive. B) Negative. C) Zero. D) None of the above. Show Answer Correct Answer: D) None of the above. 5. SI unit of work is A) Kg. B) Ml. C) N. D) J. Show Answer Correct Answer: D) J. 6. True or false:kinetic energy depends on an object's acceleration and mass. A) True. B) False. C) All the above. D) None of the above. Show Answer Correct Answer: B) False. 7. What is the definition of power? A) Power is the product of force and velocity. B) Power is the product of force and work done per unit time. C) Power is the product of force per unit time and velocity. D) Power is the rate at which work is done. Show Answer Correct Answer: D) Power is the rate at which work is done. 8. A cyclist travels up a slope through a vertical height h in a time t. The mass of the cyclist and his bike is m.The average power of the cyclist is A) $\frac{mgh}{t}$. B) $\frac{m^2gh}{t}$. C) $mgh\times t$. D) $\frac{mgh}{t^2}$. Show Answer Correct Answer: A) $\frac{mgh}{t}$. 9. The sum of kinetic and potential energy is called ..... A) Sum energy. B) Nonmechanical energy. C) Mechanical energy. D) Space energy. Show Answer Correct Answer: C) Mechanical energy. 10. What is the significance of the work-energy theorem in mechanical systems? A) It describes the conservation of momentum in collisions. B) The work-energy theorem relates work done to changes in kinetic energy, simplifying analysis of mechanical systems. C) It only applies to systems in equilibrium. D) It states that energy cannot be created or destroyed. Show Answer Correct Answer: B) The work-energy theorem relates work done to changes in kinetic energy, simplifying analysis of mechanical systems. 11. 1 joule in erg is A) 10$^{8}$ ergs. B) 10$^{6}$ ergs. C) 10$^{7}$ ergs. D) 10$^{5}$ erg. Show Answer Correct Answer: C) 10$^{7}$ ergs. 12. A car of mass $1.5\times10^3kg$ A) $750\times\left(25\right)^2$. B) $750\times\left(\frac{25}{2}\right)^2$. C) $1500\times\left(25\right)^2$. D) $1500\times\left(\frac{25}{2}\right)^2$. Show Answer Correct Answer: A) $750\times\left(25\right)^2$. 13. It takes 0.5 seconds for a crane to move an object with a potential energy of 1000 J to a potential energy of 4000 J. What is the power of the machine? A) 8000 watts. B) 4000 watts. C) 6000 watts. D) 2000 watts. Show Answer Correct Answer: C) 6000 watts. 14. The SI unit for power is ..... ? A) Watts. B) Joules. C) Newtons. D) Metres. Show Answer Correct Answer: A) Watts. 15. Which of the following statements best describes the law of conservation of energy? A) Energy can be created but not destroyed. B) Energy can be destroyed but not created. C) Energy cannot be created or destroyed. D) Energy can be created and destroyed freely. Show Answer Correct Answer: C) Energy cannot be created or destroyed. 16. 1 Horsepower is equal to A) 574 watts. B) 745 watts. C) 754 watts. D) 457 watts. Show Answer Correct Answer: B) 745 watts. 17. The kinetic energy of an object depends on which of the following factors? A) Its height above the ground. B) Its mass and velocity. C) Its volume. D) Its color. Show Answer Correct Answer: B) Its mass and velocity. 18. Calculate the electricity bill amount for a month of 30 days, if the rate of electricity is 2.50 rupees per unit and the following devices are used as specified:a. Two bulbs of 40W for six hours.b. Two tubelights of 50W for eight hours.c. A TV of 120W for six hours. A) Rs. 150. B) Rs. 200. C) Rs. 175. D) Rs. 300. Show Answer Correct Answer: A) Rs. 150. 19. The force that does no work on the object is A) Friction. B) Force of gravity. C) Applied force. D) Horizontal component of the applied force. Show Answer Correct Answer: A) Friction. 20. 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 two. B) Increases by four. C) Decreases by two. D) Decreases by four. Show Answer Correct Answer: B) Increases by four. 21. 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) 216, 090 J. D) 0 J. Show Answer Correct Answer: C) 216, 090 J. 22. 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. 23. Which of the following quantities is most commonly used in sports? A) Force. B) Impulse. C) Momentum. D) Velocity. Show Answer Correct Answer: C) Momentum. 24. Which of the following statements is TRUE about power? A) Power is a basic quantity. B) Power is a vector quantity. C) Power is the rate at which energy being transfer. D) Power is defined as force per unit time. Show Answer Correct Answer: C) Power is the rate at which energy being transfer. 25. 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) Tim, because it took him more time. C) Marisol, because it took her more time. D) Marisol, because it took her less time. Show Answer Correct Answer: B) Tim, because it took him more time. ← 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