This quiz works best with JavaScript enabled. Home > Class 11 > Class 11 Physics (Part I) Chapter 4 Work – Quiz 8 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Class 11 Physics (Part I) Chapter 4 Work Quiz 8 (25 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. A 60 kg Ewok is travelling at a constant speed of 7 m/s. What is its kinetic energy in KJ? A) 1.47 KJ. B) 210 KJ. C) 147 KJ. D) 1470 KJ. Show Answer Correct Answer: A) 1.47 KJ. 2. If a force of 10 N moves an object 5 m, what is the work done? A) 15 J. B) 5 J. C) 10 J. D) 50 J. Show Answer Correct Answer: D) 50 J. 3. 1 J is equivalent to A) 1 kg m. B) 1 kg s. C) 1 N s. D) 1 N m. Show Answer Correct Answer: D) 1 N m. 4. If a 10 kg object falls freely from a height of 20 meters, what is its final kinetic energy just before it hits the ground? A) 100 J. B) 200 J. C) 400 J. D) 2000 J. Show Answer Correct Answer: D) 2000 J. 5. What type of energy includes both kinetic and potential energy? A) Mechanical energy. B) Chemical energy. C) Heat energy. D) Sound energy. Show Answer Correct Answer: A) Mechanical energy. 6. When a car is braked to a stop, its kinetic energy is converted into: A) Thermal energy. B) Electrical energy. C) Potential energy. D) Sound energy. Show Answer Correct Answer: A) Thermal energy. 7. A 40-kg person is climbing 3 m up a flight of stairs in 6 seconds. How much power did they exert climbing the stairs? A) 400 W. B) 1200 W. C) 200 W. D) 120 W. Show Answer Correct Answer: C) 200 W. 8. If a light bulb uses 60 watts of power and operates for 2 hours, how much energy does it consume? A) 120 J. B) 7200 J. C) 432000 J. D) 120000 J. Show Answer Correct Answer: C) 432000 J. 9. If a machine has an efficiency of 80% and uses 500 J of energy, how much useful work is done? A) 300 J. B) 450 J. C) 400 J. D) 350 J. Show Answer Correct Answer: C) 400 J. 10. A car engine does 5000 J of work in 10 seconds. What is the power output of the engine? A) 500 W. B) 50 W. C) 5000 W. D) 5 W. Show Answer Correct Answer: A) 500 W. 11. How does potential energy differ from kinetic energy? A) Potential energy is stored energy based on position; kinetic energy is energy of motion. B) Potential energy is the energy of sound waves. C) Kinetic energy is stored energy based on position. D) Potential energy is always greater than kinetic energy. Show Answer Correct Answer: A) Potential energy is stored energy based on position; kinetic energy is energy of motion. 12. How fast must a 1000 kg car be moving to have a kinetic energy of 400 000 J? A) 22.7 m/s. B) 28.28 m/s. C) 800 m/s. D) None of the above. Show Answer Correct Answer: B) 28.28 m/s. 13. When is work considered to be done on an object? A) All of the above. B) When the object is displaced. C) When a force is applied to the object. D) When the object changes its state of motion. Show Answer Correct Answer: A) All of the above. 14. How long will it take a moving object traveling at a velocity of 6 m/s to move 30 meters? A) 5 s. B) 180 s. C) 36 s. D) 24 s. Show Answer Correct Answer: A) 5 s. 15. What is the sum of all the system's kinetic and potential energy called? A) Thermal energy. B) Potential energy. C) Internal energy. D) Chemical energy. Show Answer Correct Answer: C) Internal energy. 16. Energy can neither be ..... nor ..... A) Created, destroyed. B) Made, created. C) Added, subtracted. D) Multiplied, divided. Show Answer Correct Answer: A) Created, destroyed. 17. The unit used to measure power is the A) Watt. B) Newton. C) Joule. D) Newton*meter. Show Answer Correct Answer: A) Watt. 18. An 80 kg skier stands at the top of a 40 meter slope. What is her gravitational potential energy before she skies down the slope? A) 3200 J. B) 31, 360 J. C) 15, 680 J. D) 19.6 J. Show Answer Correct Answer: B) 31, 360 J. 19. What is the work done by gravity on a satellite in orbit? A) Negative work. B) Positive work. C) Zero work. D) Infinite work. Show Answer Correct Answer: C) Zero work. 20. Two objects were lifted by a machine. Object A had a mass of 2000 grams, and was lifted at a speed of 2 m/sec. Object B had a mass of 4000 grams and was lifted at a rate of 3 m/sec. Which object had a higher amount of kinetic energy when lifted? A) Object A. B) Object B. C) Both are the same since they travelled the same distance. D) Not enough information. Show Answer Correct Answer: B) Object B. 21. What is defined as the product of the magnitudes of displacement and thecomponent of the force parallel to the displacement? A) Work. B) Energy. C) Momentum. D) Power. Show Answer Correct Answer: A) Work. 22. What is the work-energy theorem? A) Work done is equal to the change in kinetic energy. B) Work done is independent of energy. C) Work done is equal to the change in potential energy. D) Work done is equal to the total energy. Show Answer Correct Answer: A) Work done is equal to the change in kinetic energy. 23. It takes 60 J of work to push a large box 6 m across a floor. Assuming the push is in the same direction as the displacement, what is the magnitude of the force on the box? A) 6 N. B) 10 N. C) 60 N. D) 360 N. E) None of these. Show Answer Correct Answer: B) 10 N. 24. Define potential energy in your own words. A) Potential energy is the energy that an object has due to its temperature. B) Potential energy is the stored energy in an object based on its position or state. C) Potential energy is the energy released during a chemical reaction. D) Potential energy is the energy of motion in an object. Show Answer Correct Answer: B) Potential energy is the stored energy in an object based on its position or state. 25. A measure of energy transfer is what? A) Work. B) Power. C) Force. D) None of the above. Show Answer Correct Answer: A) Work. ← 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 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