This quiz works best with JavaScript enabled. Home > Class 11 > Class 11 Physics (Part I) Chapter 4 Work – Quiz 23 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Class 11 Physics (Part I) Chapter 4 Work Quiz 23 (25 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. By how much does kinetic energy increase if the momentum is increased by 20% A) 55%. B) 66%. C) 44%. D) 77%. Show Answer Correct Answer: C) 44%. 2. A rubber ball falling from a height of 5 m rebounds from a hard floor to a height of 3.5 m. The % loss of energy during the impact is A) 20%. B) 30%. C) 43%. D) 50%. Show Answer Correct Answer: C) 43%. 3. Will you use more power running up the stairs or walking up the stairs? A) Running up the stairs. B) Walking up the stairs. C) The same in both. D) None of the above. Show Answer Correct Answer: B) Walking up the stairs. 4. Watt is equal to one ..... A) Joule per second. B) Meter per second. C) Ampere per second. D) Farad per second. Show Answer Correct Answer: A) Joule per second. 5. How is work defined in physics? A) Work is defined as the product of force and distance in the direction of the force. B) Work is the force applied over time. C) Work is the total energy of an object. D) Work is defined as the change in momentum of an object. Show Answer Correct Answer: A) Work is defined as the product of force and distance in the direction of the force. 6. The equation for gravitational potential energy is A) PE$_{g}$ = mgh. B) PE$_{g}$= 1/2kx$^{2}$. C) PE$_{g}$= Fd. D) PE$_{g}$ = 1/2mv$^{2}$. Show Answer Correct Answer: A) PE$_{g}$ = mgh. 7. You have to push with 15 N of force to move it 10 meters. How much work do you do? A) 15 Joules. B) 150 Joules. C) 1.5 Joules. D) .67 Joules. Show Answer Correct Answer: B) 150 Joules. 8. The velocity of a vehicle of mass 1 tonne increases from 20 m/s to 30 m/s. Find the work done by the engine. A) 40 kJ. B) 100 kJ. C) 225 kJ. D) 250 kJ. Show Answer Correct Answer: D) 250 kJ. 9. What is the unit of energy in the International System of Units (SI)? A) Watt. B) Volt. C) Calorie. D) Joule. Show Answer Correct Answer: D) Joule. 10. Kwh A) 14.0 x 10J. B) 19.8 x 10 J. C) 14.4 x 10 J. D) 14.4 x 10J. Show Answer Correct Answer: B) 19.8 x 10 J. 11. From the top of a 70-meter-high building, a l-kilogram ball is thrown directly downward with an initial speed of 10 meters per second. If the ball reaches the ground with a speed of 30 meters per second, the energy lost to friction is most nearly: A) 0J. B) 100J. C) 300J. D) 400J. E) 700J. Show Answer Correct Answer: C) 300J. 12. When two bodies collide inelastically, then A) Kinetic energy of the system alone is conserved. B) Only momentum is conserved. C) Both energy and momentum are conserved. D) Neither energy nor momentum is conserved. Show Answer Correct Answer: B) Only momentum is conserved. 13. If a student lifts a textbook that is 1.2kg, how much force does she use? A) 11.8N. B) 1.2 N. C) 11.8J. D) Not enough information. Show Answer Correct Answer: A) 11.8N. 14. A chain of mass m and length 'L' is over hanging from the edge of a smooth horizontal table such that 3/4 th of its length is lying on the table. The work done in pulling the chain completely on to the table is A) MgL/16. B) MgL/32. C) 3mgL/32. D) MgL/8. Show Answer Correct Answer: B) MgL/32. 15. There is a clock at the top of a tower that is 45m high. The clock weighs 20 kg. Calculate its potential energy. Remember g=9.8 m/s A) 8100 J. B) 9.8 m/s. C) 900 J. D) 8820 J. Show Answer Correct Answer: D) 8820 J. 16. What is work? A) The amount of energy. B) The transfer of force over a distance. C) Rate of work in a given time. D) The change in distance in a given time. Show Answer Correct Answer: B) The transfer of force over a distance. 17. You apply a 25 N force to a crate causing it to displace by 5 meters. How much work is done? A) 5 J. B) 30 J. C) 20 J. D) 125 J. Show Answer Correct Answer: D) 125 J. 18. Qn 4-When a light and heavy ball are dropped at the same time and with same velocity and they collide, why does the light one bounce higher than the heavier one? A) Lighter ball gains more energy during the fall. B) Lighter ball flies off with some energy of the heavier ball during collision. C) The lighter ball's energy is released during collision. D) Both the balls will bounce to the same height. Show Answer Correct Answer: B) Lighter ball flies off with some energy of the heavier ball during collision. 19. Calculate the KE of a body of mass 0.11 kgand momentum 20 kgm/s A) 200 J. B) 2000 W. C) 2000 J. D) None of the above. Show Answer Correct Answer: C) 2000 J. 20. Sebastian starts his car and drives down the road with a half a tank of gas. What is the energy conversion in this scenario? A) Kinetic Energy to Chemical Potential Energy. B) Gravitational Potential Energy to Kinetic Energy. C) Nuclear Potential Energy to Kinetic Energy. D) Chemical Potential Energy to Kinetic Energy. Show Answer Correct Answer: D) Chemical Potential Energy to Kinetic Energy. 21. In force against displacement graph, the area under the graph represents A) Velocity. B) Acceleration. C) Force. D) Work done. Show Answer Correct Answer: D) Work done. 22. What is the effect of friction on work done? A) Friction increases the work done by an object. B) Friction has no effect on the work done. C) Friction opposes motion and reduces the amount of work done on an object by converting some of the energy into heat. D) Friction only affects the speed of an object, not the work done. Show Answer Correct Answer: C) Friction opposes motion and reduces the amount of work done on an object by converting some of the energy into heat. 23. S.I unit for power is A) Joule. B) Watt. C) Newton. D) None of the above. Show Answer Correct Answer: B) Watt. 24. The kinetic energy depends on A) Volume and density. B) Temperature and pressure. C) Color and shape. D) Mass and velocity. Show Answer Correct Answer: D) Mass and velocity. 25. What is the requirement of doing work? A) Speed. B) Energy. C) Mass. D) Weight. Show Answer Correct Answer: B) Energy. ← 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