Book M Ch 4 Test

24 Questions

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Book M Ch 4 Test

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Questions and Answers
  • 1. 
    Place a checkmark beside all of the things that would be considered work. 
    • A. 

      Typing

    • B. 

      Holding a pencil

    • C. 

      Studying

  • 2. 
    The unit of measure for power is
    • A. 

      Newton

    • B. 

      Joule

    • C. 

      Watt

  • 3. 
    The unit of measure for work is
    • A. 

      Newton

    • B. 

      Joule

    • C. 

      Watt

  • 4. 
    The unit of measure for force is
    • A. 

      Newton

    • B. 

      Joule

    • C. 

      Watt

  • 5. 
    The unit of measure for distance is
    • A. 

      Pascal

    • B. 

      Meter

    • C. 

      Second

  • 6. 
    The unit of measure for time is
    • A. 

      Pascal

    • B. 

      Meter

    • C. 

      Second

  • 7. 
    The unit of measure for pressure is
    • A. 

      Pascal

    • B. 

      Meter

    • C. 

      Second

  • 8. 
    A device that makes work easier by changing the size or direction of the applied force.
    • A. 

      Work

    • B. 

      Machine

    • C. 

      Efficiency

  • 9. 
    This causes the output work of a machine to be less than the input force
    • A. 

      Mechanical advantage

    • B. 

      Work

    • C. 

      Friction

  • 10. 
    The rate at which work is being done.
    • A. 

      Power

    • B. 

      Wheel an Axles

    • C. 

      Efficiency

  • 11. 
     A moving inclined plane
    • A. 

      Wedge

    • B. 

      Wheel and axle

    • C. 

      Screw

  • 12. 
     A simple machine has _____ movement (s).
    • A. 

      One

    • B. 

      Two

    • C. 

      Three

  • 13. 
    Two rigidly attached wheels that rotate together
    • A. 

      Inclined plane

    • B. 

      Wheel and axle

    • C. 

      Pulley

  • 14. 
    A sloped surface
    • A. 

      Wedge

    • B. 

      Inclined plane

    • C. 

      Screw

  • 15. 
    Exertion of a force on an object that produces motion in the direction of the force
    • A. 

      Power

    • B. 

      Mechanical advantage

    • C. 

      Work

  • 16. 
    The force a machine puts out
    • A. 

      Input force

    • B. 

      Output force

  • 17. 
    The force you exert on a machine
    • A. 

      Input force

    • B. 

      Output force

  • 18. 
    The pivot point of a lever.
    • A. 

      Machine

    • B. 

      Pulley

    • C. 

      Fulcrum

  • 19. 
    An inclined plane wrapped around a shaft.
    • A. 

      Wedge

    • B. 

      Screw

    • C. 

      Wheel and axle

  • 20. 
    A grooved wheel that redirects force (changes the direction)using a rope.
    • A. 

      Pulley

    • B. 

      Wheel and axle

    • C. 

      Wedge

  • 21. 
    To lift a crate, a pulley system exerts a force of 3,500 N. Find the mechanical advantage of the pulley system if the input force is 70 N.  Put ONLY the numeric value.
  • 22. 
    You do 100 J of work in pulling out a nail with a claw hammer. If the hammer does 50 J of work, what is the hammer's efficiency? ___% (numeric value only)
  • 23. 
    A teacher does 1450 J of work in 6 s. How much power did he use? ____W (numeric value only).
  • 24. 
    As you push a lawn mover, the horizontal force is 700 N. If you push the mower a distance of 900 M, how much work do you do? ____J (numeric value only, make sure you use a comma).