This quiz works best with JavaScript enabled. Home > Class 11 > Class 11 Physics (Part I) Chapter 4 Work – Quiz 2 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Class 11 Physics (Part I) Chapter 4 Work Quiz 2 (25 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. In the formula for kinetic energy, what does "m" represent? A) Spring constant. B) Acceleration due to gravity. C) Mass of the object. D) Height of the object. Show Answer Correct Answer: C) Mass of the object. 2. W = 500 Joules t = 25 secondsP =??? A) 0.05 W. B) 20 W. C) 12500 W. D) 2000 W. Show Answer Correct Answer: B) 20 W. 3. What is mechanical work? A) When an object moves without any force. B) When a force is applied but no movement occurs. C) When a force moves an object over a distance. D) When energy is lost in a system. Show Answer Correct Answer: C) When a force moves an object over a distance. 4. A 16 N force is applied to an object and 96 J of work is done. How far was the object moved? A) 6 m. B) 16 m. C) 80 m. D) 1536 m. Show Answer Correct Answer: A) 6 m. 5. What is Power in physics? A) Power is the amount of force applied over a distance. B) Power is the rate at which work is done or energy is transferred. C) Power is the total energy consumed in a system. D) Power is the measure of an object's mass. Show Answer Correct Answer: B) Power is the rate at which work is done or energy is transferred. 6. The power of a crane is 6.25 kW. How much mass of coal it can lift in 1 hour from a mine of 100 m depth? The efficiency of the crane is 80%and g = 10 ms$^{-2}$. A) 1800 kg. B) 18000 kg. C) 180 kg. D) 180000 kg. Show Answer Correct Answer: B) 18000 kg. 7. Power is defined as A) P = t/W, where t is time and W is work. B) P = W/d, where W is work and d is the distance. C) P = W/t, where W is work and t is time. D) None of the above. Show Answer Correct Answer: C) P = W/t, where W is work and t is time. 8. If the speed of a particle is doubled, what happens toits kinetic energy? A) It becomes four times larger. B) It becomes two times larger. C) It becomes half. D) It is unchanged. Show Answer Correct Answer: A) It becomes four times larger. 9. Calculate the kinetic energy of a 2 kg object moving at 3 m/s. A) 15 Joules. B) 9 Joules. C) 6 Joules. D) 12 Joules. Show Answer Correct Answer: B) 9 Joules. 10. When the velocity of a moving object is doubled, the ..... A) Net work done by the object is doubled. B) Kinetic energy of the object is doubled. C) Potential energy of the object is doubled. D) Linear momentum of the object is doubled. Show Answer Correct Answer: D) Linear momentum of the object is doubled. 11. I do 132 Joules of work on a bookcase. If I apply a force of 6 Newtons, how far have I moved the bookcase? A) 22 meters. B) 792 meters. C) 17 meters. D) 320 meters. Show Answer Correct Answer: A) 22 meters. 12. You pull a backpack across the room with a force of 30 N at an angle of 25$^\circ$. How much work is created if you pull the backpack for 12 m? (Round to the nearest whole number) A) 360 J. B) 750 J. C) 300 J. D) 326 J. Show Answer Correct Answer: D) 326 J. 13. Which type of energy is associated with an object's height above the ground? A) Kinetic energy. B) Thermal energy. C) Gravitational potential energy. D) Chemical energy. Show Answer Correct Answer: C) Gravitational potential energy. 14. How can you increase your power when mowing grass? A) Spend more time mowing your grass. B) Mow less of your yard per minute. C) Mow your yard in less time. D) None of the above. Show Answer Correct Answer: C) Mow your yard in less time. 15. A smaller unit of work is called ..... A) Erg. B) MmHg. C) Atm. D) Mol. Show Answer Correct Answer: A) Erg. 16. An object at rest may also have ..... A) Speed. B) Velocity. C) Momentum. D) Kinetic Energy. E) Potential Energy. Show Answer Correct Answer: E) Potential Energy. 17. Brakes are used to slow down a moving car. Into which form of energy is most of the kinetic energy converted as the car slows down? A) Chemical. B) Elastic. C) Thermal. D) Sound. Show Answer Correct Answer: C) Thermal. 18. Which unit is used to measure kinetic energy in the International System of Units (SI)? A) Joules. B) Watts. C) Newtons. D) Volts. Show Answer Correct Answer: A) Joules. 19. Which statement does not illustrate power? A) A farmer plowing the rice field all day. B) A Siberian husky pulling a sled all day. C) A principal sitting on a chair while observing several classes all day. D) A teacher encoding his power point presentation in his laptop all day. Show Answer Correct Answer: C) A principal sitting on a chair while observing several classes all day. 20. If you are in a car that is being pulled down a 56.0 m path with a force of 12.5 Newton's (N), what is the "work" done on the car? A) 70 J. B) 700 J. C) 350 J. D) 7000 J. E) 3500 J. Show Answer Correct Answer: B) 700 J. 21. A lorry of mass 4000kg is travelling at a speed of 4.0m/ s. A car has a mass of 1000kg. The kinetic energy of the car is equal to the kinetic energy of the lorry. What is the speed of the car? A) 2.0 m/s. B) 4.0 m/s. C) 8.0 m/s. D) 16.0 m/s. Show Answer Correct Answer: C) 8.0 m/s. 22. Which of the following objects has the most kinetic energy? A) A 20 kg toddler running at 5 m/s. B) A 50 kg toddler running at 30 m/s. C) A 90 kg toddler running at 30 m/s. D) A 100 kg toddler running at 2 m/s. Show Answer Correct Answer: C) A 90 kg toddler running at 30 m/s. 23. A woman of mass 50 kg has 81 J of kinetic energy. What is her speed? A) 1.3 m/s. B) 1.6 m/s. C) 1.8 m/s. D) 3.2 m/s. Show Answer Correct Answer: C) 1.8 m/s. 24. In the elastic collision of a heavy vehicle moving with the velocity of 10m/s and a small stone at rest, the stone will fly away with a velocity equal to A) 5 m/s. B) 10 m/s. C) 20 m/s. D) 40 m/s. Show Answer Correct Answer: C) 20 m/s. 25. The power of a person is 200 W, then which of statement will be correct ..... A) Person can do a work of 200 J in 100 seconds. B) Person can do a work of 200 J in 1 second. C) Person consumes 200 W energy. D) Person can do a work of 20 J in 1 second. Show Answer Correct Answer: B) Person can do a work of 200 J in 1 second. ← PreviousNext →Related QuizzesClass 11 Physics (Part I) Chapter 4 Work Quiz 1Class 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 10Class 11 Physics (Part I) Chapter 4 Work Quiz 11 🏠 Back to Homepage 📘 Download PDF Books 📕 Premium PDF Books