This quiz works best with JavaScript enabled. Home > Class 11 > Class 11 Physics (Part I) Chapter 4 Work – Quiz 4 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Class 11 Physics (Part I) Chapter 4 Work Quiz 4 (25 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. Which of these is a measure of force? A) 100 newtons. B) 100 meters per second. C) 100 joules. D) 100 watts. Show Answer Correct Answer: A) 100 newtons. 2. What does a negative answer for work due to friction indicate? A) The object stopped moving. B) No change in energy. C) Energy was taken away from the object. D) Energy was added to the object. Show Answer Correct Answer: C) Energy was taken away from the object. 3. What is the unit for power? A) What. B) Watt. C) Joule. D) Jewel-Osco. Show Answer Correct Answer: B) Watt. 4. What is the unit of measurement for power? A) Joule. B) Newton. C) Watt. D) None of the above. Show Answer Correct Answer: C) Watt. 5. Which of the following would result in an increase in power? A) Decrease the amount of time to do work. B) Increase the amount of time to do work. C) Decrease the distance moved. D) Decrease the amount of work done. Show Answer Correct Answer: A) Decrease the amount of time to do work. 6. How is power calculated? A) Time x energy. B) Energy x distance. C) Work/time. D) Force/time. Show Answer Correct Answer: C) Work/time. 7. A lorry and a car moving with the same K.E. are brought to rest by applying the same retarding force. then A) Lorry will come to rest in a shorter distance. B) Car will come to rest in a shorter distance. C) Both come to rest in same distance. D) None of these. Show Answer Correct Answer: C) Both come to rest in same distance. 8. When an object is at rest, not moving, what type of energy does it have? A) Potential. B) Kinetic. C) Chemical. D) Thermal. Show Answer Correct Answer: A) Potential. 9. A motor rated 100W has been operating for 150s. If the efficiency of the motor is 75%, how much work is done by the motor? A) 1125000J. B) 1125J. C) 11250J. D) 24000J. Show Answer Correct Answer: C) 11250J. 10. If the power of motor is 40 kW, at what speed does it raise a load of 20000 N A) 2m/s. B) 5m/s. C) 0.2 m/s. D) None of the above. Show Answer Correct Answer: A) 2m/s. 11. A car moves 3 times as fast as another car. Compared to the slower car, the faster car has ..... A) 3 times the kinetic energy. B) 6 times the kinetic energy. C) 9 times the kinetic energy. D) 12 times the kinetic energy. Show Answer Correct Answer: C) 9 times the kinetic energy. 12. Abby has a mass of 50 kg and is going for a run. If her speed changes from 5 m/s to 7.5 m/s, what is work done on Abby? A) 312.5 J. B) 125 J. C) 62.5 J. D) 781.25. Show Answer Correct Answer: D) 781.25. 13. Gravitational potential energy is defined as A) The energy an object has due to its height above the ground. B) The energy an object has due to its motion. C) The energy a spring has due to its stretch. D) The chemical energy stored in the molecules of atoms. Show Answer Correct Answer: A) The energy an object has due to its height above the ground. 14. Describe a scenario where work is done but no energy is transferred. A) A balloon floating in the air. B) A person pushing against a stationary wall. C) A person lifting a heavy box. D) A car driving on a highway. Show Answer Correct Answer: B) A person pushing against a stationary wall. 15. Which of the following is the correct formula for calculating power? A) $P = \frac{W}{t}$. B) $P = F\cdot d$. C) $P = mgh$. D) $P = \frac{1}{2}mv^2$. Show Answer Correct Answer: A) $P = \frac{W}{t}$. 16. A toy train with a mass of 12 kg is moving with a velocity of 7 m/s. How much kinetic energy does the train have? A) 42 J. B) 84 J. C) 588 J. D) 294 J. Show Answer Correct Answer: D) 294 J. 17. If a group of workers can apply a force of 1, 000 Newtons to move a crate 20 meters, what amount of work will they have accomplished? A) 20, 000 J. B) 200 J. C) 2, 000 J. D) 20 J. Show Answer Correct Answer: A) 20, 000 J. 18. A 10 gram ball is held 2 meters from the ground. How much energy does it have? A) 0 J. B) .2 J. C) 2 J. D) 20 J. Show Answer Correct Answer: B) .2 J. 19. It takes 6.0 seconds for a pulley system to lift a crate weighing 300. N to a height of 5.0 meters. How much power is required to lift the crate? A) 360 W. B) 250 W. C) 10 W. D) 0.1 W. Show Answer Correct Answer: B) 250 W. 20. What would 1m be an example of? A) Work. B) Power. C) Time. D) Distance. Show Answer Correct Answer: D) Distance. 21. The unit of power (aka Joule per second) A) Joule. B) Minute. C) Watt. D) Pound. Show Answer Correct Answer: C) Watt. 22. KWh stand for A) Kilowestohm. B) Kilometwer. C) Kilowatt hour. D) None of the above. Show Answer Correct Answer: C) Kilowatt hour. 23. Large man:Fw=1000N, time = 5 secondsSmall child:Fw=400N, time = 1 secondBoth people walked up the same set of steps (1 m). Who did the most work? A) Large man because he weighs more. B) Small child because she weighs less. C) Large man because he took more time. D) Small child because she took less time. Show Answer Correct Answer: A) Large man because he weighs more. 24. In which of the situations is NO work being done? A) Pushing a box across the floor. B) Lifting a box from the ground to a table top. C) Holding a box overhead. D) Carrying a box up a flight of stairs. Show Answer Correct Answer: C) Holding a box overhead. 25. A table tennis ball has a mass of 2.45g (convert this to kg). Suppose the ball is hit across the table with a speed of 4.0m/s. What is its kinetic energy? A) 0.049 J. B) 4.9 J. C) 0.0196 J. D) 1919.6 J. Show Answer Correct Answer: C) 0.0196 J. ← 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 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