This quiz works best with JavaScript enabled. Home > Cbse > Class 11 > Science > Physics Part I > Class 11 Physics (Part I) Chapter 4 Work – Quiz 18 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Class 11 Physics (Part I) Chapter 4 Work Quiz 18 (60 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. According to the work-energy theorem, a net work causes A) A change in kinetic energy. B) A change in potential energy. C) A kinetic energy. D) None of the above. Show Answer Correct Answer: A) A change in kinetic energy. 2. If the work done to stretch a spring by 8.0 cm is 10 J, the spring constant is A) 250 N/m. B) 3125 N/m. C) 5000 N/m. D) 2500 N/m. Show Answer Correct Answer: B) 3125 N/m. 3. What would have the greatest kinetic energy? A) A car driving down a hill. B) A person running down a hill. C) A ball rolling down a hill. D) None of the above. Show Answer Correct Answer: A) A car driving down a hill. 4. A ball of mass 2kg is thrown up with a speed of 10m/s. Find the kinetic energy of the ball at the time of throwing. A) 200J. B) 99J. C) 100J. D) 50J. Show Answer Correct Answer: C) 100J. 5. In which of the following is NO work done A) Lifting a 5N book straight up. B) Dropping a 5N book. C) Allowing a 5N book to rest on the table. D) None of the above. Show Answer Correct Answer: C) Allowing a 5N book to rest on the table. 6. What is the renewable source that produces energy from the sun? A) Geothermal. B) Solar. C) Hydroelectric. D) Biomass. Show Answer Correct Answer: B) Solar. 7. What is the spring constant? A) The ratio of the force affecting the spring to the displacement caused by it. B) The ratio of the energy affecting the spring to the displacement caused by it. C) The ratio of the speed affecting the spring to the displacement caused by it. D) The ratio of the mass affecting the spring to the displacement caused by it. Show Answer Correct Answer: A) The ratio of the force affecting the spring to the displacement caused by it. 8. "A volleyball on a house's rooftop" . In what type of mechanical energy does it fall? A) Potential Energy. B) Kinetic Energy. C) Both. D) None of the above. Show Answer Correct Answer: A) Potential Energy. 9. Which of the following is an example of work being done? A) Pushing down on a stationary stone cube. B) Pushing a box across a floor. C) Lifting and carrying a box. D) None of the above. Show Answer Correct Answer: B) Pushing a box across a floor. 10. What type of prehistoric environment did oil and natural gas form from? A) Desert. B) Forrests. C) Oceans. D) Swamps. Show Answer Correct Answer: C) Oceans. 11. The work done by a bullet train going to uganda is A) The work done by a bullet train going to Uganda is zero. B) The work done by a bullet train going to Uganda is negative. C) The work done by a bullet train going to Uganda is positive. D) The work done by a bullet train going to Uganda is not related to energy. Show Answer Correct Answer: C) The work done by a bullet train going to Uganda is positive. 12. What is the S.I. unit for work? A) Joule. B) Newton. C) Calorie. D) Watt. Show Answer Correct Answer: A) Joule. 13. What is the unit of thermal energy? A) N. B) Pa. C) J. D) W. Show Answer Correct Answer: C) J. 14. Power is measure in A) Watts. B) Newton-meters. C) Joules. D) Joules-meters. Show Answer Correct Answer: A) Watts. 15. Which is doing work? A) Pushing a wall. B) Holding a box. C) Picking up a pencil. D) Sitting in a chair. Show Answer Correct Answer: C) Picking up a pencil. 16. Which of the following is an example of non-conservative force? A) Frictional force. B) Elastic force. C) Magnetic force. D) Gravitational force. Show Answer Correct Answer: A) Frictional force. 17. A weightlifter holding a dumbbell over his head. Is work done? A) Yes. B) No. C) All the above. D) None of the above. Show Answer Correct Answer: B) No. 18. Amir picks his school bag from the floor and put it on the table.What is the gravitational potential energy gained by the bag if the bag has the mass of 1.5 kg and the height of the table is 0.5 m?(Gravity acceleration is assumed as 10 m s-2) A) 7.5 J. B) 75 J. C) 0.75 J. D) 750 J. Show Answer Correct Answer: A) 7.5 J. 19. Assertion:When a ball collides elastically with the floor, it rebounds with the same velocity as with it strikes.Reason:Momentum of Earth + Ball system remains constant. A) Assertion and Reason are true, Reason is correct explanation of Assertion. B) Assertion and Reason are true, Reason is not correct explanation of Assertion. C) Assertion is true, Reason is false. D) Both Assertion and Reason are false. Show Answer Correct Answer: B) Assertion and Reason are true, Reason is not correct explanation of Assertion. 20. An engine reaches its top speed from rest in 7.5 s. It is able to perform 250, 000 J of work in that time. How much power does this engine have in that time? A) 33, 333 W. B) 1, 875, 000 W. C) 0.00003 W. D) 1873 W. Show Answer Correct Answer: A) 33, 333 W. 21. If a machine does 200 J of work in 10 seconds, what is its power output? A) 30 W. B) 15 W. C) 25 W. D) 20 W. Show Answer Correct Answer: D) 20 W. 22. In physics, power is the rate at which ..... is used. A) Speed. B) Energy. C) Force. D) Current. Show Answer Correct Answer: B) Energy. 23. What is the unit used to express work? A) Joule. B) Watt. C) All the above. D) None of the above. Show Answer Correct Answer: A) Joule. 24. 1 When a ball accelerates down a slope, it ..... A) Gains both kinetic energy and potential energy. B) Gains kinetic energy but loses potential energy. C) Gains potential energy but loses kinetic energy. D) Neither gains nor loses both kinetic energy and potential energy. Show Answer Correct Answer: B) Gains kinetic energy but loses potential energy. 25. What is the difference between Work and Energy? A) Work is the process of energy transfer, while energy is the capacity to do work. B) Work and energy are the same concepts. C) Energy is the process of work transfer, while work is the capacity to do energy. D) Work is a type of energy that can be stored. Show Answer Correct Answer: A) Work is the process of energy transfer, while energy is the capacity to do work. 26. In scientific terms, you do work only when you exert? on an object and move it. A) Energy. B) Work. C) Force. D) None of the above. Show Answer Correct Answer: C) Force. 27. What type of energy does a moving object possess? A) Potential energy. B) Thermal energy. C) Chemical energy. D) Kinetic energy. Show Answer Correct Answer: D) Kinetic energy. 28. How much power is created if Jayden S. does 20J of work in 2 seconds? A) 10J. B) 2W. C) 10W. D) 2J. Show Answer Correct Answer: C) 10W. 29. In a certain situation, Force and Displacement are not equal to zero. But the work done by the force is zero. From this, we conclude that A) Force and Displacement are in the same directions. B) Force and Displacement are in opposite directions. C) Force and Displacement are at right angles. D) None of the above. Show Answer Correct Answer: C) Force and Displacement are at right angles. 30. In which situation is there work done on the system? A) A weightlifter holding a barbell in the air. B) A waiter carrying the order of the customer. C) A basket being lifted. D) A man carrying a bag of cement on his shoulder. Show Answer Correct Answer: C) A basket being lifted. 31. Which of the following is a correct expression of power? A) Distance divided by time. B) Work divided by time. C) Force divided by distance. D) Work multiplied by time. Show Answer Correct Answer: B) Work divided by time. 32. When is the potential energy of an oscillating simple pendulum i) Maximum II ) Minimum A) Mean and Extreme position. B) Extreme and mean position. C) All the above. D) None of the above. Show Answer Correct Answer: B) Extreme and mean position. 33. A 2 kg ball is attached to a 0.80 m string and whirled in a horizontal circle at a constant speed of 6 m/s. The work done on the ball during each revolution is: A) 90J. B) 16J. C) 0. D) 72J. Show Answer Correct Answer: C) 0. 34. Distance can be expressed in what? A) Joules. B) Newtons. C) Meters. D) None of the above. Show Answer Correct Answer: C) Meters. 35. An object of mass m raised to a height 2h above ground level posses a gravitational potential energy of A) 2mgh. B) 1/2 mgh. C) Mgh. D) $\frac{mg}{2h}$. Show Answer Correct Answer: A) 2mgh. 36. Simple machines make work easier by increasing what? A) The acceleration of a massive object. B) The time required to do work. C) The distance over which work is done. D) The force needed to do work. Show Answer Correct Answer: C) The distance over which work is done. 37. If you hold a 20 N object 2 m off of the ground, how much work have you done? A) 40 J of Work. B) 18 J of Work. C) 10 J of Work. D) No Work. Show Answer Correct Answer: D) No Work. 38. If 150 Joules of work is needed to move a box 10 meters, what force was used? A) 1500 N. B) 1.5 N. C) 15 N. D) 150 N. Show Answer Correct Answer: C) 15 N. 39. What type of work is done when pushing a wall? A) Zero Work. B) Maximum Work. C) Positive Work. D) Negative Work. Show Answer Correct Answer: A) Zero Work. 40. Energy is the ability to do work. When you carry an apple that weighs 1 kg, 2 meter from the ground at a speed of 5 m/s2. What is the work done? A) 20 J. B) 10 J. C) 200 J. D) 100 J. Show Answer Correct Answer: A) 20 J. 41. Which energy transformation occurs in a toaster? A) Chemical to electric. B) Electric to thermal. C) Thermal to potential. D) Kinetic to chemical. Show Answer Correct Answer: B) Electric to thermal. 42. A 35kg child has 1800J chemical energy, climbs 3.2m high stairs in 3 minutes. Calculate:i. The power used to climb the stairs.ii. Children's energy efficiency. A) 5.7 W, 45 %. B) 6.2 W, 62 %. C) 6.1 W, 61 %. D) None of the above. Show Answer Correct Answer: C) 6.1 W, 61 %. 43. A truck and car have same kinetic energy. Which has more momentum? A) Truck. B) Car. C) Truck and car have same momentum. D) None of these. Show Answer Correct Answer: A) Truck. 44. If a 2 kg object is lifted to a height of 5 meters, what is its potential energy? A) 120 Joules. B) 50 Joules. C) 98.1 Joules. D) 75 Joules. Show Answer Correct Answer: C) 98.1 Joules. 45. A pump lifts 200 kg water per minute through a vertical height of 15 m. Calculate the power input rating of the pump if it is 65% efficient? A) 890 W. B) 770 W. C) 640 W. D) 500 W. E) 480 W. Show Answer Correct Answer: B) 770 W. 46. What is the formula for weight? A) W = mg. B) W = g/m. C) W = mg$^{2}$. D) W = m/g. Show Answer Correct Answer: A) W = mg. 47. Calculate the work done by a 47 N force pushing a pencil 0.26 m. A) 12.8. B) 13.5. C) 11.2. D) 12.2. Show Answer Correct Answer: D) 12.2. 48. The rate at which energy is transferred. A) Energy. B) Power. C) Work. D) None of the above. Show Answer Correct Answer: B) Power. 49. The rate (how fast) at which work is being done. A) No choice is correct. B) Joules. C) Power. D) Newton. E) Work. Show Answer Correct Answer: C) Power. 50. 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) 2 J. D) 9 J. Show Answer Correct Answer: A) 27 J. 51. 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. 52. Mechanical Energy is equal to A) Kinetic Energy + Heat Energy. B) Kinetic Energy + Electrical Energy. C) Kinetic Energy + Potential Energy. D) Kinetic Energy + Chemical Energy. Show Answer Correct Answer: C) Kinetic Energy + Potential Energy. 53. 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. 54. 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. 55. Calculate the KE of a moving 4 kilogram object traveling at a velocity of 3 m/s. A) 36 J. B) 18 J. C) 12 J. D) 6 J. Show Answer Correct Answer: B) 18 J. 56. 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) 49 J. B) 980 J. C) 9.8 J. D) 98 J. Show Answer Correct Answer: D) 98 J. 57. Which of the following is the correct equation for calculating an object's gravitational potential energy? A) PE = mg + h. B) PE = gh. C) PE = mgh. D) PE = mg / h. Show Answer Correct Answer: C) PE = mgh. 58. 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. 59. The formula for work is A) Work = force x time. B) Work = power x distance. C) Work = power x time. D) Work = force x distance. Show Answer Correct Answer: D) Work = force x distance. 60. What are the units for power? A) Kilograms. B) Newtons. C) Joules. D) Watts. Show Answer Correct Answer: D) Watts. ← PreviousNext →Related QuizzesScience QuizzesClass 11 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 8 🏠 Back to Homepage 📘 Download PDF Books 📕 Premium PDF Books