This quiz works best with JavaScript enabled. Home > Class 11 > Class 11 Physics (Part I) Chapter 4 Work – Quiz 36 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Class 11 Physics (Part I) Chapter 4 Work Quiz 36 (25 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. Two Spring of spring constants 1500N/m and 3000N/m respectively are stretched with the same force find the ratio of potential energy A) 1:2. B) 1:3. C) 1:4. D) 2:1. Show Answer Correct Answer: D) 2:1. 2. Assertion:If momentum of a body increases by 50%, its K.E. will increase by 125%.Reason:K.E. is proportional to square of velocity. A) Assertion and Reason are true, Reason is 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 correct explanation of Assertion. 3. A 5 kg object is lifted to a height of 10 m. What is its potential energy? A) 980 J. B) 150 J. C) 490.5 J. D) 300 J. Show Answer Correct Answer: C) 490.5 J. 4. What is an example of a situation where no work is done? A) Driving a car on a flat road. B) Pushing a stationary car. C) Cycling up a hill. D) Rolling a bowling ball. Show Answer Correct Answer: B) Pushing a stationary car. 5. If a 1.2Kg book is lifted 5 meters, how much work is done? A) 4.2N. B) 4.2J. C) 58.8W. D) 58.8J. Show Answer Correct Answer: D) 58.8J. 6. The rate in which work is done is equivalent to A) Force. B) Power. C) Kinetic energy. D) Work. Show Answer Correct Answer: B) Power. 7. Which of the following quantities and units are INCORRECTLY paired? A) Work and joule. B) Power and watt. C) Energy and watt. D) Force and newton. Show Answer Correct Answer: C) Energy and watt. 8. Device that transforms energy is called A) Transducer. B) Machine. C) Transformer. D) Dynamo. Show Answer Correct Answer: A) Transducer. 9. Pushing a box across the room A) Work. B) No Work. C) All the above. D) None of the above. Show Answer Correct Answer: A) Work. 10. A load of 60N is moved through a distance of 2m when an effort of 20N moving at a distance of 8m is applied A) 75%. B) 133%. C) 30%. D) 40%. Show Answer Correct Answer: A) 75%. 11. What is the power of the engine when the velocity of the car is v, mass m, acceleration a, and external resistance R A) (R-ma)v. B) (R+ma)v. C) Mav. D) Rv. Show Answer Correct Answer: B) (R+ma)v. 12. A vehicle travelling at a constant velocity v has kinetic energy E. The velocity of the vehicle change to 1/2 v. The kinetic energy of the vehicle now will be: A) $\frac{1}{4}E$. B) $\frac{1}{2}E$. C) $\frac{ }{ }2E$. D) $\frac{ }{ }4E$. Show Answer Correct Answer: A) $\frac{1}{4}E$. 13. A ball is rolling on the ground, what type of energy does it have? A) Potential energy. B) Kinetic energy. C) Heat energy. D) Sound energy. Show Answer Correct Answer: B) Kinetic energy. 14. Kinetic energy depends on which two things? A) Velocity and acceleration. B) Mass. C) Mass and momentum. D) Velocity and mass. Show Answer Correct Answer: D) Velocity and mass. 15. What happen to the gravitational force on a body when you move away from earth's surface? A) It decreases. B) It increases. C) It stays constant. D) It is converted into kinetic energy. Show Answer Correct Answer: A) It decreases. 16. A force F = 5+2x act on a body in X direction. Where X is in meters. Calculate the work done in moving the body from rest to a distance of X= 2m A) 14j. B) 16J. C) 18J. D) 20J. Show Answer Correct Answer: A) 14j. 17. What is the formula for G.P.E.? A) Mgh. B) Mg/h. C) M$^{2}$gh. D) Mgh$^{2}$. Show Answer Correct Answer: A) Mgh. 18. How much work is done on a 200 kg crate that is hoisted 2.0 m in a time of 4 s? A) 400 J. B) 1000 J. C) 1600 J. D) 4000 J. Show Answer Correct Answer: D) 4000 J. 19. A toy car has 100 J of kinetic energy. If the velocity decreases by a factor of 8, what is the new kinetic energy? A) 1.56 J. B) 12.5 J. C) 800 J. D) 1600 J. Show Answer Correct Answer: A) 1.56 J. 20. A bullet of mass 10 gm strikes a target at 400 m/s velocity and loses half of its initial velocity. The loss of kinetic energy in joules is A) 800. B) 200. C) 400. D) 600. Show Answer Correct Answer: D) 600. 21. The unit for work is derived in honor of ..... A) James Watt. B) Isaac Newton. C) James Prescott Joule. D) Blaise Pascal. Show Answer Correct Answer: C) James Prescott Joule. 22. W = Kg m$^{2}$/s$^{2}$Is work equivalent to the following? A) Yes, it's equivalent. B) Yes, it's not equivalent. C) No, its not equivalent. D) Yesn't. Show Answer Correct Answer: A) Yes, it's equivalent. 23. A force = (6i-8j) N, acts on a particle and displaces it over 4 m along the X-axis and then displaces it over 6 m along the Y-axis. The total work done during the two displacements is A) 72 J. B) 24 J. C) -24 J. D) Zero. Show Answer Correct Answer: C) -24 J. 24. Find the velocity of body of mass 100g having kinetic energy of 20J. A) 0.2 m/s. B) 0.1m/s. C) 20m/s. D) 10m/s. Show Answer Correct Answer: C) 20m/s. 25. If a 1300-kg car has been lifted so it has 19500 J of potential energy, it was lifted up ..... A) 1.5 m. B) 150 m. C) 15 m. D) 0.67 m. Show Answer Correct Answer: A) 1.5 m. ← 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