Work And Power Quiz

10 Questions | Total Attempts: 322

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Work And Power Quiz

Questions and Answers
  • 1. 
    A piston, moving through a distance of 15 cm, pushes a box weighing 8.0 kg onto a conveyor belt with a force of 40 N. How much work is done by the piston on the box? A   6.0 J          B   120 J          C   320 J          D   600 J
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    • D. 

  • 2. 
    How high can a worker lift a 40.00-kg bag of sand if he produces 4,000 J of energy? Assume no energy is used to overcome friction.  A   1.020 m          B   10.20 m          C   102.0 m          D   1,020 m
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  • 3. 
    Neglecting friction, if a child exerts a force of 85 N on the handle of a wagon that makes a 35° angle with the horizontal, how far is the wagon pulled when 280 J of work are done?                                                                                                                           A    ≤ 5.0 m B    > 5.0 m but ≤ 10 m C    > 10 m but ≤ 15 m D    > 15 m but ≤ 20 m
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  • 4. 
    This is a graph representing work versus time. What does the slope of the graph represent? A   accelerationB   impulseC   powerD   velocity
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  • 5. 
    If a forklift raises a 76-kg load a distance of 2.5 m, how much work has it done? A   80 J B  19 JC   300 JD   1900 J
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  • 6. 
    The amount of power required to move an object can be increased without changing the amount of work required.  How can this happen?   A increase the time required to do the work B increase the friction on the surface over which the object is moving C increase the weight of the object being moved D decrease the time required to do the work
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  • 7. 
    A woman driving a 2000-kg car at 15 m/s fully applies the brakes 50 m from a stoplight. If the car stops 5.0 m before the light, what is the magnitude of the average force applied by the brakes?  A   4.1 E 103 N B   4.5 E 103 N C   5.0 E 103 N D   4.5 E 104 N
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  • 8. 
    A boy pushes his wagon at constant speed along a level sidewalk. The graph below represents the relationship between the horizontal force exerted by the boy and the distance the wagon moves. What is the total work done by the boy in pushing the wagon 4.0 meters? A   5.0 J          B   120 J          C   7.5 J          D   180 J
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  • 9. 
    A 3.0-kg mass slides down a 5.0-m-long frictionless, inclined plane.  How much work is needed to stop the mass at the bottom of the incline? A   15 J          B   74 J            C   130 J          D   150 J
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  • 10. 
    A 60.0-kilogram runner has 1920 joules of kinetic energy. At what speed is she running? A  5.66 m/s     B  32.0 m/s     C  8.00 m/s     D  64.0 m/s
    • A. 

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    • D. 

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