This quiz works best with JavaScript enabled. Home > Class 11 > Class 11 Physics (Part I) Chapter 4 Work – Quiz 3 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Class 11 Physics (Part I) Chapter 4 Work Quiz 3 (25 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. What does power measure in the context of physics? A) The distance moved. B) The speed of an object. C) The force applied. D) The rate of doing work. Show Answer Correct Answer: D) The rate of doing work. 2. A bicycle chain of length 1.6 m and of mass 1 kg is lying on a horizontal floor. If g = 10ms$^{-2}$, the work done in lifting it with one end touching the floor and the other end 1.6 m above the floor is A) 10 J. B) 3.2 J. C) 8 J. D) 16 J. Show Answer Correct Answer: C) 8 J. 3. ..... is the rate of doing work. A) Conservation of energy. B) Joules. C) Energy. D) Power. Show Answer Correct Answer: D) Power. 4. How do you calculate power? A) P = w / t. B) P = f * t. C) P = w * t. D) None of the above. Show Answer Correct Answer: A) P = w / t. 5. The net work required to stop a moving object is equal to the ..... A) Inertia of the object. B) Change in kinetic energy of the object. C) Change in momentum of the object. D) Change in impulse of the object. Show Answer Correct Answer: B) Change in kinetic energy of the object. 6. Energy is A) Stored work. B) Is destroyed when used. C) Can not be changed into another form of energy. D) Measured in newtons. Show Answer Correct Answer: A) Stored work. 7. How can power be increased? A) By decreasing the work done. B) By decreasing both work and time. C) By increasing the time taken. D) By increasing the work or decreasing the time. Show Answer Correct Answer: D) By increasing the work or decreasing the time. 8. What is the unit of work in the International System of Units (SI)? A) Watt. B) Pascal. C) Joule. D) Newton. Show Answer Correct Answer: C) Joule. 9. What is the power of an agent that does 100 J of work in 5 seconds? A) 100 W. B) 50 W. C) 25 W. D) 20 W. Show Answer Correct Answer: C) 25 W. 10. By increasing the speed at which you do work, you increase your A) Work. B) Energy. C) Power. D) None of the above. Show Answer Correct Answer: C) Power. 11. Lupe lowers a picture that is hanging a wall. Is this an example of positive work, negative work or no work? A) Positive Work. B) Negative Work. C) No Work. D) Can Not be determined. Show Answer Correct Answer: B) Negative Work. 12. A box of mass 8.0kg is lifted from the ground and placed on a shelf. The box gains 100 J of potential energy.The box falls off the shelf. Air resistance can be ignored. At what speed does the box hit the ground? A) 3.5 m/s. B) 5.0 m/s. C) 25 m/s. D) 28 m/s. Show Answer Correct Answer: B) 5.0 m/s. 13. What is one things that effects potential energy: A) Height. B) Speed. C) Length. D) None of the above. Show Answer Correct Answer: A) Height. 14. 25 N force is applied to a box and box moves 10m. Find the work done by the force. A) 250J. B) 25.48J. C) 25N. D) 2452.5J. Show Answer Correct Answer: A) 250J. 15. Velocity and kinetic energy have a ..... relationship. A) Inverse. B) Direct. C) Reverse. D) Diagonal. Show Answer Correct Answer: B) Direct. 16. A weight-lifter raises a 2000N weight through a vertical height of 2.0m in 0.80s. What useful power does he develop in doing this? A) 800 W. B) 700W. C) 4000W. D) 5000W. Show Answer Correct Answer: D) 5000W. 17. How do you determine the net work done on an object? A) The net work done is the sum of all work done on it by external forces. B) The net work done is the total energy consumed by the object. C) The net work done is the difference between potential and kinetic energy. D) The net work done is the work done against friction only. Show Answer Correct Answer: A) The net work done is the sum of all work done on it by external forces. 18. The unit we use to measure work is the A) Dyne. B) Joule. C) Newton. D) Quark. Show Answer Correct Answer: B) Joule. 19. Which is the type of collision in which both the linear momentum and the kinetic energy of the system remain conserved? A) Inelastic Collision. B) Elastic Collision. C) Destructive collision. D) None of these. Show Answer Correct Answer: B) Elastic Collision. 20. If a force of 10 N moves an object 5 m, how much work is done? A) 25 J. B) 40 J. C) 50 J. D) 75 J. Show Answer Correct Answer: C) 50 J. 21. Lifting an elevator 18m takes 100, 000J. If doing so takes 20s, what is the average power of the elevator during the process? A) 90, 000 W. B) 90, 000N. C) 5, 000 W. D) 5, 000N. Show Answer Correct Answer: C) 5, 000 W. 22. What is the Work-Energy Theorem in physics? A) Work is equal to the change in mechanical energy. B) Work is equal to the change in potential energy. C) Work is equal to the change in thermal energy. D) Work is equal to the change in kinetic energy. Show Answer Correct Answer: D) Work is equal to the change in kinetic energy. 23. When a long spring is stretched by $x$ $Nx$ A) $\frac{\text{U}}{\text{N}}$. B) $UN$. C) $N^2U$. D) $\frac{U}{N^3}$. Show Answer Correct Answer: C) $N^2U$. 24. A device that converts electrical energy to light energy. A) A blender. B) A light bulb. C) A bycycle. D) A balloon. Show Answer Correct Answer: B) A light bulb. 25. The SI unit for mass is the A) Kilograms. B) Newtons. C) Joules. D) Watts. Show Answer Correct Answer: A) Kilograms. ← 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 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 10Class 11 Physics (Part I) Chapter 4 Work Quiz 11 🏠 Back to Homepage 📘 Download PDF Books 📕 Premium PDF Books