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Class 11 Physics (Part I) Chapter 4 Work Quiz 22 (60 MCQs)

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1. T/F:Work and mechanical energy are related
2. A student needs 10 Newtons of force to lift a box to the top of a 2 meter shelf. How much work do they do?
3. What is the potential energy of a 3kg ball that is on the ground?
4. How high is a-3.00 kg object that has 300 J of energy? (Use g = 9.8 m/s$^{2}$.)
5. A car skids to a stop along a level highway. Is this an example of positive, negative or zero being done on the car? Is this an example of positive, negative, or zero work being done on the ca
6. A man of mass 60 kg climbs up a 20m long staircase to the top of a building 10m high. What is the work done by him? (Take g=10m/s$^{2}$)
7. According to Newton's Law of Inertia, objects in motion tend to .....
8. Three situations are listed. (1) someone blowing air into a party balloon(2) a crane lifting a block of concrete(3) a pile of books at rest on a shelf In which situations is work being done?
9. During inelastic collision between two bodies, which of the following quantities always remain conserved?
10. The value of negative work done depends on
11. Define power in the context of physics.
12. According to Newton's Third Law, for every action, there is an/an ..... reaction.
13. A basketball has 2000 J of work done on it over 27 meters. What is the force on the basketball?
14. TRUE or FALSE:CHEMICAL Potential Energy is present in bread, cereals and bacon.
15. What unit are both work and energy expressed in?
16. What is the mathematical formulation of work when the body displaces opposite to the direction of force applied?
17. The FARTHER you move an object, the more work you do.
18. Energy due to motion is
19. An object is acted on by a retarding force of 10 N and at a particular instant its kinetic energy is 6 J. The object will come to rest after it has travelled a distance of
20. The work done on an object is proportional to the change in its:
21. What type of energy is illustrated in the position of molecules and electric charges are being altered in using fuel?
22. In which situation is NO work done?
23. Pushing a box across the floor is an example of
24. As mass increases, KE .....
25. 1 Joule can be defined as work done by
26. A stone is thrown vertically upward with a velocity v, the kinetic energy at the highest point is-
27. An airplane passenger carries a 215-N suitcase up the stairs, a displacement of 4.20 m vertically and 4.60 m horizontally. How much work does the passenger do on the suitcase.
28. Why does a rubberband that is flung after stretching it not move as far as energy models would predict?
29. While releasing the arrow from a stretched bow, the potential energy of the bow is converted into
30. Devon and Shahrul are loading identical cement blocks onto Shahrul's pickup truck. Devon lifts his block straight up from the ground to the truck, whereas Shahrul slides his block up a ramp on massless, frictionless rollers. Which statement is true?
31. How far will an object move in 12 seconds if it is traveling at a velocity of 8 m/s?
32. In order to do work, energy is
33. Conservation of mechanical energy in an isolated system is only subject to conservative forces. Which of the following is an example of a conservative force?
34. A weightlifter holds a 100 kg barbell above her head. Is work done?
35. What two forms of energy come from the sun?
36. A 2kg ball and a 5kg are thrown off the side of a 5m high building.Which ball will hit the ground with more energy?
37. An object has 100 J of kinetic energy. If the velocity increases by a factor 5, then what is the new kinetic energy?
38. Dry cell converts-
39. When you stretch a rubber band, you are storing ..... energy.
40. What is the principle of conservation of energy principle?
41. A water balloon is launched off a building. Where in its trajectory does it have the most kinetic energy?
42. How much work is done if Seth moves a 20 N boulder 4m?
43. If displacement is in the direction of force, then work is .....
44. A man pushes a crate along a factory floor by exerting a force of 55N. If the crate moves a distance of 4m, how much work does the man perform?
45. Based on the formula for potential energy, what 2 variables influence PE the most?
46. A spring 40 mm long is stretched by the application of a force. If 10N force is required to stretch the spring through 1mm, then work done in stretching the spring is(if T is tension in the spring and k is spring constant)
47. What happens to the kinetic and potential energy in a conservative system?
48. A boy lifts a box of mass 4 kg to a height of 200 cm. How much energy does the box gain?
49. North Korea tests a nuclear bomb by dropping it in the ocean. What is the energy transformation (Ignore gravitational potential energy!)
50. What are the units for the power formula:power=work/time
51. A boy exerts an average force of 68N when he lifts a box 1.1m. How much work does he do?
52. Is the force of attraction that causes an apple to fall to the ground
53. Mr. B's and Mr. P's classes competed in a game of tug of war. Mr. B's class pulled to the right with a force of 4, 000 N. Mr. P's class pulled to the left with a force of 5, 000 N. As a result the rope moved 5.1 m to the left. How much work was done by the net force?
54. The SI unit of work
55. What unit is commonly used to express work in physics?
56. The spring will have maximum potential energy when
57. When a car engine operates, it:
58. A man standing on the edge of the roof of a 20 m tall building projects a ball of mass 100 gm vertically up with a speed of 10 m s$^{-1}$. The kinetic energy of the ball when it reaches the ground will be [ g =10 m s$^{-2}$]
59. The units of the spring constant "k" are .....
60. The units of power are defined as
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