This quiz works best with JavaScript enabled. Home > Class 11 > Class 11 Physics (Part I) Chapter 4 Work – Quiz 20 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Class 11 Physics (Part I) Chapter 4 Work Quiz 20 (25 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. At time t = 0 s particle starts moving along the x-axis. If its kinetic energy increases uniformly with time 't', the net force acting on it must be proportional to A) $\sqrt{t}$. B) Constant. C) T. D) $\frac{1}{\sqrt{t}}$. Show Answer Correct Answer: D) $\frac{1}{\sqrt{t}}$. 2. A man of mass 75 kg runs up a staircase consisting of 30 steps. Each step is 20 cm high.The man takes a time of 7.0 s to run from the bottom of the staircase to the top.What is the average rate of increase of gravitational potential energy of the man? A) 64 W. B) 450 W. C) 630 W. D) 4400 W. Show Answer Correct Answer: C) 630 W. 3. A group of campers create a campfire by burning several wooden logs. Which statement best describes the energy transformations that occur when the logs burn? A) Chemical energy from the wood is converted into light and heat energy. B) Heat energy from the logs is converted into chemical and light energy. C) Chemical energy from the air is converted into mechanical and light energy. D) Heat energy from the air is converted into mechanical and light energy. Show Answer Correct Answer: A) Chemical energy from the wood is converted into light and heat energy. 4. A car with 100, 000 J of kinetic energy changes to having 500, 000 J of kinetic energy. What is the work done? A) +500, 000 J. B) +100, 000 J. C) -400, 000 J. D) +400, 000 J. Show Answer Correct Answer: D) +400, 000 J. 5. The Newton meter is the unit of A) Momentum. B) Power. C) Work. D) Gravitational intensity. Show Answer Correct Answer: C) Work. 6. What type of energy do we use to cook food? A) Mechanical. B) Radiant. C) Thermal. D) Kinetic. Show Answer Correct Answer: C) Thermal. 7. A car moves up a hill at constant speed. Which one of the following represents the workdone by the weight of the car as it moves up the hill? A) $\Delta$E$_{k}$. B) -$\Delta$E$_{k}$. C) $\Delta$E$_{p}$. D) -$\Delta$E$_{p}$. Show Answer Correct Answer: D) -$\Delta$E$_{p}$. 8. A 80 kg sprinter is running at a speed of 10 m/s. Calculate the kinetic energy of the sprinter. A) 400 J. B) 8000 J. C) 800 J. D) 4000 J. Show Answer Correct Answer: D) 4000 J. 9. Which trig function is used in the work equation? A) Sine. B) Cosine. C) Tangent. D) None of the above. Show Answer Correct Answer: B) Cosine. 10. If it takes 200N to push a box up a 10m ramp and onto the truck, how much work would it take? A) 20W. B) 20J. C) 2000J. D) 2000W. Show Answer Correct Answer: C) 2000J. 11. Consider the statements below:I Work is done on an object when a force displaces the object in the direction of the force.II Mechanical energy of a system is conserved when an external force does no work on the system.III The work done on an object by a net force is equal to the kinetic energy of the object.Which of the above statements is/are TRUE? A) Only I. B) I and II only. C) II and III only. D) I, II and III. Show Answer Correct Answer: B) I and II only. 12. The work done by a force field F=k(xi+yj) in moving a particle from (0, 0) to (1, 1) is: A) K. B) 2k. C) 2k. D) 0. Show Answer Correct Answer: B) 2k. 13. In the equation for work done, what does 'd' represent? A) Density. B) Diameter. C) Direction. D) Distance. Show Answer Correct Answer: D) Distance. 14. What is the equation for power? A) P = Work/time. B) P = Force/time. C) P = time/distance. D) P = Work * time. Show Answer Correct Answer: A) P = Work/time. 15. The total amount of energy A) Varies. B) Can cancel out to zero. C) Goes out into space. D) Remains constant. Show Answer Correct Answer: D) Remains constant. 16. What is the relationship between work and power? A) Power is the total amount of work done. B) Power is the rate of doing work. C) Power is the force applied to do work. D) Work and power are unrelated concepts. Show Answer Correct Answer: B) Power is the rate of doing work. 17. What is the definition of work done on a system? A) Force exerted and the object moves in the opposite direction. B) Product of force and displacement of object in the direction of the force. C) A man pushed a wall and the wall did not moves. D) Work done and cause the energy out from the system. Show Answer Correct Answer: B) Product of force and displacement of object in the direction of the force. 18. Which of the following shows an energy transformation from chemical energy to electrical to light energy? A) A bolt of lightning lights the night sky. B) A candle glows brightly in the dark. C) A fire in a fireplace lights up a room. D) A battery causes a flashlight to shine. Show Answer Correct Answer: D) A battery causes a flashlight to shine. 19. If a machine does 500 J of work in 10 seconds, what is its power output? A) 50 W. B) 5 W. C) 5000 W. D) 500 W. Show Answer Correct Answer: B) 5 W. 20. Which is not a type of energy? A) Nuclear energy. B) Electromagnetic energy. C) Radio energy. D) Electrical energy. Show Answer Correct Answer: C) Radio energy. 21. A body of mass m = $10^{-2}$ $KV^2$ $v_0=10ms^{-1}$ A) $10^{-4}kgm^{-1}$. B) $10^{-1}kgm^{-1}s^{-1}$. C) $10^{-3}kgm^{-1}$. D) $10^{-3}kgs^{-1}$. Show Answer Correct Answer: A) $10^{-4}kgm^{-1}$. 22. W=125 Jd=10 mF=??? A) 12.5 N. B) 1250 N. C) 0.08 N. D) 135 N. Show Answer Correct Answer: A) 12.5 N. 23. A block of ice sliding down an incline has its maximum kinetic energy at ..... A) The top. B) The bottom. C) Halfway down. D) Impossible to predict. Show Answer Correct Answer: B) The bottom. 24. How much work is done on a 200-kg crate that is hoisted 2 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. 25. Which scenario requires more work? A) Option 1 Abigail lifting her physics book one meter off her desk in one second. B) Option 2 Henry lifting his physics book one meter off his desk in two seconds. C) Both scenarios (Abigail & Henry) require the same amount of work. D) Neither scenarios (Abigail nor Henry) require any work. Show Answer Correct Answer: C) Both scenarios (Abigail & Henry) require the same amount of 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 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