This quiz works best with JavaScript enabled. Home > Class 11 > Class 11 Physics (Part I) Chapter 4 Work – Quiz 45 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Class 11 Physics (Part I) Chapter 4 Work Quiz 45 (25 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. The rate (how fast) at which work is being done. A) Power. B) Joules. C) Work. D) Newton. E) No choice is correct. Show Answer Correct Answer: A) Power. 2. How much KE does a moving 6 kilogram object have if it moves with a velocity of 3 m/s? A) 27 J. B) 18 J. C) 9 J. D) 2 J. Show Answer Correct Answer: A) 27 J. 3. What is the law of conservation of energy? A) Energy is constant in all situations. B) Energy is always lost in transformations. C) Energy can only be transformed from one form to another. D) Energy can be created and destroyed. Show Answer Correct Answer: C) Energy can only be transformed from one form to another. 4. Mechanical Energy is equal to A) Kinetic Energy + Chemical Energy. B) Kinetic Energy + Potential Energy. C) Kinetic Energy + Heat Energy. D) Kinetic Energy + Electrical Energy. Show Answer Correct Answer: B) Kinetic Energy + Potential Energy. 5. Assertion:Water at the foot of the waterfall is always at different temperature from that at the top.Reason:The potential energy of water at the top is converted into heat energy during falling. A) Assertion and Reason are true, Reason is the correct explanation of Assertion. B) Assertion and Reason are true, Reason is not the correct explanation of Assertion. C) Assertion is true, Reason is false. D) Both assertion and Reason are false. Show Answer Correct Answer: A) Assertion and Reason are true, Reason is the correct explanation of Assertion. 6. If Ali push a sack of rice with a force 15N along 2m distance. Calculate the work done. A) 3J. B) 30J. C) 300J. D) None of the above. Show Answer Correct Answer: B) 30J. 7. Calculate the KE of a moving 4 kilogram object traveling at a velocity of 3 m/s. A) 18 J. B) 36 J. C) 12 J. D) 6 J. Show Answer Correct Answer: A) 18 J. 8. What is the potential energy of a 2 kg object held at a height of 5 meters above the ground? (Use $g = 9.8 \, \text{m/s}^2$ A) 98 J. B) 9.8 J. C) 980 J. D) 49 J. Show Answer Correct Answer: A) 98 J. 9. Which of the following is the correct equation for calculating an object's gravitational potential energy? A) PE = mgh. B) PE = mg / h. C) PE = mg + h. D) PE = gh. Show Answer Correct Answer: A) PE = mgh. 10. In which of the following situations is work not being done? A) A chair is lifted vertically with respect to the floor. B) A bookcase is slid across carpeting. C) A table is dropped onto the ground. D) A stack of books is carried at waist level across a room. Show Answer Correct Answer: D) A stack of books is carried at waist level across a room. 11. The formula for work is A) Work = force x distance. B) Work = power x distance. C) Work = force x time. D) Work = power x time. Show Answer Correct Answer: A) Work = force x distance. 12. What are the units for power? A) Watts. B) Joules. C) Newtons. D) Kilograms. Show Answer Correct Answer: A) Watts. 13. An object lifted 10m gains 200 J of potential energy. If the same object is lifted 20m, its potential energy gain is ..... A) Half as much. B) The same. C) Twice as much. D) Four times as much. E) More than 4 times as much. Show Answer Correct Answer: C) Twice as much. 14. A frictionless pendulum of length 3 m swings with an amplitude of 10$^\circ$. At its maximum displacement, the potential energy of the pendulum is 10 J. What is the kinetic energy of the pendulum when its potential energy is 5 J? A) 3.3 J. B) 5 J. C) 6.7 J. D) 10 J. E) 15 J. Show Answer Correct Answer: B) 5 J. 15. When body moves in a circular path and covers quarter part distance 10 m with speed 5 m/s, how much is the work done by an object. A) 2J. B) No work. C) All the above. D) None of the above. Show Answer Correct Answer: B) No work. 16. Your fingers pressing on piano keys and moving along the keyboard. Is work done? A) Yes. B) No. C) All the above. D) None of the above. Show Answer Correct Answer: A) Yes. 17. A toy gun has a spring of force constant k. After charging the spring by compressing it through a distance ofx, the toy releases a shot of mass m vertically upwards.Then the shot will travel a vertical height of: A) $\frac{2mg}{kx^2}$. B) $\frac{kx^2}{mg}$. C) $\frac{kx^{ }}{mg}$. D) $\frac{kx^2}{2mg}$. E) $\frac{mg}{kx^{ }}$. Show Answer Correct Answer: D) $\frac{kx^2}{2mg}$. 18. Determine the torque on a force F = I +2j-3k about a point O. The position of the vector With relative to point O is r=2i+3j-k A) 7i+5j +k. B) 5i+2j+3k. C) 5i+2j-3k. D) -7i+5j+k. Show Answer Correct Answer: D) -7i+5j+k. 19. How much work is produced when 350 N is used to move a car 5 m? A) 70 J. B) 1750 J. C) 355 J. D) 175 J. Show Answer Correct Answer: B) 1750 J. 20. A body of mass M1 collides elastically with another mass M2 at rest. There is maximum transfer of energy when A) M1 > M2. B) M1 < M2. C) M1 = M2. D) Same for all values of M1 and M2. Show Answer Correct Answer: C) M1 = M2. 21. What does 'work' specifically mean in physics? A) Studying for exams. B) Daily job tasks. C) Force applied over a distance. D) Completing assignments. Show Answer Correct Answer: C) Force applied over a distance. 22. Which formula is this? A) Potential Energy. B) Kinetic Energy. C) Mechanical Energy. D) Work. Show Answer Correct Answer: B) Kinetic Energy. 23. If force acts on the opposite direction then the displacement is ..... A) Weaker than force. B) Negative. C) Positive. D) Greater than force. Show Answer Correct Answer: B) Negative. 24. A 15 kg object is lifted to a height of 5 meters. What is the gravitational potential energy of the object? (Use $g = 9.8 \, \text{m/s}^2$ A) 735 J. B) 75 J. C) 150 J. D) 980 J. Show Answer Correct Answer: A) 735 J. 25. Which of the following is an example of kinetic energy? A) A car moving at 60 km/h. B) A book on a shelf. C) A compressed spring. D) A charged battery. Show Answer Correct Answer: A) A car moving at 60 km/h. ← 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