This quiz works best with JavaScript enabled. Home > Cbse > Class 11 > Science > Physics Part I > Class 11 Physics (Part I) Chapter 4 Work – Quiz 10 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Class 11 Physics (Part I) Chapter 4 Work Quiz 10 (60 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. 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%. 2. 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. 3. Watt is equal to one ..... A) Farad per second. B) Ampere per second. C) Joule per second. D) Meter per second. Show Answer Correct Answer: C) Joule per second. 4. 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. 5. The equation for gravitational potential energy is A) PE$_{g}$= Fd. B) PE$_{g}$ = mgh. C) PE$_{g}$= 1/2kx$^{2}$. D) PE$_{g}$ = 1/2mv$^{2}$. Show Answer Correct Answer: B) PE$_{g}$ = mgh. 6. 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. 7. 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) 225 kJ. B) 100 kJ. C) 40 kJ. D) 250 kJ. Show Answer Correct Answer: D) 250 kJ. 8. What is the unit of energy in the International System of Units (SI)? A) Watt. B) Volt. C) Joule. D) Calorie. Show Answer Correct Answer: C) Joule. 9. 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) 400J. C) 100J. D) 300J. E) 700J. Show Answer Correct Answer: D) 300J. 10. 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. 11. If a student lifts a textbook that is 1.2kg, how much force does she use? A) 11.8J. B) 11.8N. C) 1.2 N. D) Not enough information. Show Answer Correct Answer: B) 11.8N. 12. 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/32. B) MgL/8. C) 3mgL/32. D) MgL/16. Show Answer Correct Answer: A) MgL/32. 13. 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) 8820 J. C) 900 J. D) 9.8 m/s. Show Answer Correct Answer: B) 8820 J. 14. You apply a 25 N force to a crate causing it to displace by 5 meters. How much work is done? A) 125 J. B) 20 J. C) 5 J. D) 30 J. Show Answer Correct Answer: A) 125 J. 15. 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. 16. 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. 17. 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) Nuclear Potential Energy to Kinetic Energy. B) Chemical Potential Energy to Kinetic Energy. C) Gravitational Potential Energy to Kinetic Energy. D) Kinetic Energy to Chemical Potential Energy. Show Answer Correct Answer: B) Chemical Potential Energy to Kinetic Energy. 18. In force against displacement graph, the area under the graph represents A) Velocity. B) Force. C) Work done. D) Acceleration. Show Answer Correct Answer: C) Work done. 19. 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. 20. S.I unit for power is A) Joule. B) Watt. C) Newton. D) None of the above. Show Answer Correct Answer: B) Watt. 21. 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. 22. What is the requirement of doing work? A) Energy. B) Speed. C) Weight. D) Mass. Show Answer Correct Answer: A) Energy. 23. Which type of energy involves the potential of a chemical substance to undergo a transformation through a chemical reaction or to transform other chemical substances? A) Nuclear Energy. B) Thermal Energy. C) Electrical Energy. D) Chemical Energy. Show Answer Correct Answer: D) Chemical Energy. 24. Find the kinetic energy of a 1500-N car moving at 15 m/s? Pay attention to units! A) 8 kj. B) 17 kj. C) 1 kj. D) 25 kj. Show Answer Correct Answer: B) 17 kj. 25. If ball of mass 10kg is dropped from height of 10m then the work done by air resistance is A) 0. B) 100 J. C) -100J. D) 1000 J. Show Answer Correct Answer: A) 0. 26. This is the energy due to the splitting of atoms. A) Mechanical. B) Light / Radiant. C) Nuclear. D) Chemical. Show Answer Correct Answer: C) Nuclear. 27. The SI Unit for Energy is A) Watt. B) Calorie. C) Joule. D) Newton. Show Answer Correct Answer: C) Joule. 28. If 200 J of work is done in 4 seconds, what is the power? A) 25 W. B) 75 W. C) 50 W. D) 100 W. Show Answer Correct Answer: C) 50 W. 29. If you use 30 J of energy to move an object, you have done ..... J of work. A) 0. B) 10. C) 3. D) 30. Show Answer Correct Answer: D) 30. 30. Claire carries a 50 N box horizontally across a 10 m room. How much work did she do on the box? A) 0 J, because the force is not parallel to the displacement. B) 5 J. C) 0.2 J. D) 500 J. Show Answer Correct Answer: A) 0 J, because the force is not parallel to the displacement. 31. Which one of the following systems is there a decrease in gravitational potential energy? A) A boy stretches a horizontal spring. B) A girl jumps down from a bed. C) A crate rests at bottom of an inclined plane. D) A car ascends a steep hill. Show Answer Correct Answer: B) A girl jumps down from a bed. 32. On a force versus change in position graph, the area under the curve is a representation of: A) Position. B) Work. C) KE. D) Force. E) PE. Show Answer Correct Answer: B) Work. 33. Work done by a frictional force is A) Negative. B) Positive. C) Zero. D) None of the above. Show Answer Correct Answer: A) Negative. 34. Which form of energy does a battery store? A) Nuclear energy. B) Thermal energy. C) Chemical energy. D) Electrical energy. Show Answer Correct Answer: C) Chemical energy. 35. What type of energy is possessed by a compressed spring A) Nuclear energy. B) Chemical energy. C) Potential energy. D) Kinetic energy. Show Answer Correct Answer: C) Potential energy. 36. A wheel and axle is used to used to raise a load of 280N by a force 40N applied to the rim of the wheel. if the radii of the wheel and axle are 70cm and 5cm respectively, find the efficiency of the system. A) 10%. B) 50%. C) 14%. D) 70%. Show Answer Correct Answer: B) 50%. 37. Calculate the work done if a force of 50 N moves an object 4 meters in the direction of the force. A) 250 J. B) 150 J. C) 100 J. D) 200 J. Show Answer Correct Answer: D) 200 J. 38. If an object has a mass of 2 kg and is moving at a speed of 3 m/s, what is its kinetic energy? A) 6 Joules. B) 9 Joules. C) 15 Joules. D) 12 Joules. Show Answer Correct Answer: B) 9 Joules. 39. As a falling apple approaches the ground, its potential energy A) Increases. B) Decreases. C) Stays the same. D) None of the above. Show Answer Correct Answer: B) Decreases. 40. What is a collision in which two particles move together after collision is called? A) Incomplete inelastic collision. B) Completely inelastic collision. C) Completely elastic collision. D) Incomplete elastic collision. Show Answer Correct Answer: B) Completely inelastic collision. 41. The energy required to accelerate a car from rest to 10 m/s is E. What energy will be required to acceleratethe car from 10 m/s to 20 m/s? A) 2E. B) E. C) 3E. D) 4E. Show Answer Correct Answer: C) 3E. 42. Energy stored in a compressed spring is A) 1/2 kx$^{2}$. B) Kx$^{2}$. C) Kx. D) Mgh. Show Answer Correct Answer: A) 1/2 kx$^{2}$. 43. How much kinetic energy does a moving 6 kg object have if it moves with a velocity of 3 m/s? A) 18 J. B) 9 J. C) 27 J. D) 2 J. Show Answer Correct Answer: C) 27 J. 44. If you pull at an angle instead of in the direction in which the object moves, MORE of your force does work. A) True. B) False. C) All the above. D) None of the above. Show Answer Correct Answer: B) False. 45. Using wind power to make electricity is an example of A) Heat Energy. B) Solar Energy. C) Wind Energy. D) Light Energy. Show Answer Correct Answer: C) Wind Energy. 46. What is the formula for calculating gravitational potential energy? A) Mass * gravity * height. B) Mass * velocity. C) Force * distance. D) Mass * acceleration. Show Answer Correct Answer: A) Mass * gravity * height. 47. Water stored in a dam possesses: A) Electrical energy. B) Kinetic energy. C) Potential energy. D) No energy. Show Answer Correct Answer: C) Potential energy. 48. Your friend's car is stuck in the snow. You push very hard and become very tired but the car won't move. Did you do work? A) Yes, work was done. B) No, work wasn't done. C) All the above. D) None of the above. Show Answer Correct Answer: B) No, work wasn't done. 49. What is the unit of power in the International System of Units? A) Volt. B) Joule. C) Watt. D) Ohm. Show Answer Correct Answer: C) Watt. 50. A man carries a box across a room at constant velocity. Is work being done on the box by the man? A) No. B) Not enough information. C) Half of the time. D) Yes. Show Answer Correct Answer: A) No. 51. If a weight lifter lifts 750N by 2.0m in 5.77s, what is her power? A) 65W. B) 2164W. C) 8655W. D) 15.4mW. E) 260W. Show Answer Correct Answer: E) 260W. 52. In an elastic collision, which of the following is conserved? A) Only momentum. B) Both momentum and kinetic energy. C) Neither momentum nor kinetic energy. D) Only kinetic energy. Show Answer Correct Answer: B) Both momentum and kinetic energy. 53. Oil is a renewable source of energy. A) True. B) False. C) All the above. D) None of the above. Show Answer Correct Answer: B) False. 54. An object of weight 7 N is raised from a height of 2 m to a height of 8 m. The change in gravitational potential energy is A) $56J$. B) $412J$. C) $549J$. D) $42J$. Show Answer Correct Answer: D) $42J$. 55. What is the relationship between work and energy in physics? A) Work is the ability to do energy. B) Energy is the ability to do work. C) Work and energy are unrelated. D) Energy is the force applied over distance. Show Answer Correct Answer: B) Energy is the ability to do work. 56. A body starts from rest and moves with uniform acceleration. What is the ratio of kinetic energies at the end of 1st, 2nd and 3rd seconds of its journey? A) 1:8:27. B) 1:4:9. C) 3:2:1. D) 1:2:3. Show Answer Correct Answer: B) 1:4:9. 57. A ball is thrown into the air and gains 25 J of GPE. If it has a mass of 0.5 kg, How high up into the air did it travel? A) .02 m. B) 20 m. C) .2 m. D) 2 m. Show Answer Correct Answer: C) .2 m. 58. State whether work is a scalar or vector quantity A) Vector. B) Scalar. C) All the above. D) None of the above. Show Answer Correct Answer: B) Scalar. 59. According to the Principle of Conservation of Energy, what happens to the total energy in a closed system? A) It increases over time. B) It decreases over time. C) It remains constant. D) It varies randomly. Show Answer Correct Answer: C) It remains constant. 60. The property of an object or system that allows it to do work is ..... A) Distance. B) Energy. C) Work. D) Power. 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