Physics Midterm Exam Review Quiz

18 Questions | Total Attempts: 148

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Physics Midterm Exam Review Quiz - Quiz

A quiz to help review for the midterm exam.


Questions and Answers
  • 1. 
    How do you find the mechanical advantage of a lever? Remember to include units in your answer.
  • 2. 
    Describe the three classes of levers. Include the location of the fulcrum and the amount of force that is input and output for each class.
  • 3. 
    How do you fid the gear ratio?
  • 4. 
    How do you find the mechanical advantage of a ramp?
  • 5. 
    How do you find the mechanical advantage of a screw?
  • 6. 
    Efficiency is measured in percentages. Why is no machine 100% efficient? Copy the text below (including the dashes), paste it into your answer and then use one word.Some energy is lost to ________ in all machines.--
  • 7. 
    The efficiency is less than 100% for virtually all process that do what?
  • 8. 
    A simple machine has a mechanical advantage of 5. If the output force is 10N, what is the input force?
  • 9. 
    Which of the following is a calculation of work?
    • A. 

      Work (j) = Forece (N) x distance (m)

    • B. 

      Work (j) = Forece (N) / distance (m)

    • C. 

      Work (N) = Forece (j) x distance (m)

    • D. 

      Work (N) = Mass (kg) x Gravity x Height (m)

    • E. 

      Both 'A' and 'D' are correct.

  • 10. 
    In the image above, what hand does more work.
    • A. 

      A

    • B. 

      B

    • C. 

      C

    • D. 

      A & B are equal and are greater than C

    • E. 

      No work is done using these three forces.

  • 11. 
    Alexander has a mass of 70 kilograms. HIs apartment is on the second floor, 5 meters up from ground level. How much work does he do against gravity each time e clims the stairs to his apartment?
    • A. 

      70N

    • B. 

      9.8N

    • C. 

      5m

    • D. 

      686N

    • E. 

      None of the above

  • 12. 
    Power is measure in _______, because the man who invented the steam engine was named ______ _____.  Power (P) is equal to ______ ______ by ______.
    • A. 

      Joules; James Joule; mass; multiplied; distance

    • B. 

      Newtons; Isaac Newton; time; multiplied; distance

    • C. 

      Newtons; Isaac Newton; mass; divided; distance

    • D. 

      Kilograms; Ken Kilo; work; divided; time

    • E. 

      Watts; James Watts; work; divided; time

  • 13. 
    What is a device with moving parts that work together to accomplish a task?
    • A. 

      Gear

    • B. 

      Pulley

    • C. 

      Machine

    • D. 

      Wheel and axel

    • E. 

      Lever

  • 14. 
    In a machine, the ______ ______ in newtons, or the force that the machine applies to what you are trying to move, divided by the _____ _____ in newtons, or the force you apply to the machine, is known as the ______ ______ of the machine.
    • A. 

      Input force; output force; work done

    • B. 

      Input force; output force; power used

    • C. 

      Output force; input force; work done

    • D. 

      Output force; input force; power used

    • E. 

      Output force; input force; mechanical advantage

  • 15. 
    The _____ _____ of a machine can never be _____ than the ______ ______. When you design a machine that multiplies force, you pay by having to apply the force over a ______ distance.
  • 16. 
    The force in a rope is called the ____.
  • 17. 
    When we measure how close to perfect a machine is, we are measuring its _____.
  • 18. 
    Any process that is not 100% efficient is ___________
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