Online Quiz On Mechanics

25 Questions | Total Attempts: 93

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Online Quiz On Mechanics

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Questions and Answers
  • 1. 
    Determine the magnitude of the resultant force acting on the screw eye
    • A. 

      5.798 kN

    • B. 

      7.798 kN

    • C. 

      6.798 kN

    • D. 

      4.798 kN

  • 2. 
    What is the direction measured clockwise from the x-axis?
    • A. 

      106º

    • B. 

      103º

    • C. 

      104º

    • D. 

      105º

  • 3. 
    A trolley that moves along a horizontal beam is acted upon by two forces as shown. Knowing that a = 25º, determine the magnitude of the force P so that the resultant force exerted on the trolley is vertical.
    • A. 

      5660 N

    • B. 

      6660 N

    • C. 

      4660 N

    • D. 

      3660 N

  • 4. 
    What is the corresponding magnitude of the resultant?
    • A. 

      3730 N

    • B. 

      3830 N

    • C. 

      3930 N

    • D. 

      3630 N

  • 5. 
    The stock mounted on the lathe is subjected to a force of 60 N. Determine the coordinate direction angle β
    • A. 

      50º

    • B. 

      60º

    • C. 

      40º

    • D. 

      30º

  • 6. 
    Express the 60 N force as a Cartesian vector.
    • A. 

      F = {30i−30j​+42.4k} N

    • B. 

      F = {20i−30j​+42.4k} N

    • C. 

      F = {30i−20j​+42.4k} N

    • D. 

      F = {-30i+30j​+42.4k} N

  • 7. 
    A square foundation mat supports the four columns shown. Determine the magnitude of the resultant of the four loads.
    • A. 

      -80i

    • B. 

      -80k

    • C. 

      -80j

    • D. 

      -70j

  • 8. 
    Calculate the magnitude of the moment about the base point O of the 600-N force.
    • A. 

      2509.851 N.m

    • B. 

      2409.851 N.m

    • C. 

      2069.851 N.m

    • D. 

      2609.851 N.m

  • 9. 
    Determine the magnitude of the resultant force at A
    • A. 

      1.18 kN

    • B. 

      1.28 kN

    • C. 

      2.18 kN

    • D. 

      2.28 kN

  • 10. 
    The guy wires are used to support the telephone pole. Represent the 250 N force in Cartesian vector form.
    • A. 

      43.519i + 174.064j - 174.064k

    • B. 

      -43.519i + 174.064j – 174.064k

    • C. 

      -43.519i - 174.064j + 174.064k

    • D. 

      43.519i - 174.064j + 174.064k

  • 11. 
    The crate has a weight of 550 lb. Determine the tension in cable AB
    • A. 

      489 Ib

    • B. 

      487 Ib

    • C. 

      498 Ib

    • D. 

      478 Ib

  • 12. 
    What is the tension in cable AC
    • A. 

      518 Ib

    • B. 

      581 Ib

    • C. 

      418 Ib

    • D. 

      481 Ib

  • 13. 
    Represent the 175 N force in in Cartesian vector form
    • A. 

      -53.22i - 79.836j - 146.366k

    • B. 

      53.22i + 79.836j - 146.366k

    • C. 

      53.22i - 79.836j - 146.366k

    • D. 

      -53.22i - 79.836j - 146.366k

  • 14. 
    The screw eye is subjected to two forces, F1 and F2. Determine the magnitude of the resultant force.
    • A. 

      231 N

    • B. 

      213 N

    • C. 

      313 N

    • D. 

      321 N

  • 15. 
    What is the direction of the resultant force?
    • A. 

      55.8º

    • B. 

      56.8º

    • C. 

      54.8º

    • D. 

      45.8º

  • 16. 
    What is the sum of the moment at point A?
    • A. 

      253 Ib-ft

    • B. 

      255 Ib-ft

    • C. 

      235 Ib-ft

    • D. 

      0

  • 17. 
    What is the sum of the moment at point B?
    • A. 

      253 Ib-ft

    • B. 

      255 Ib-ft

    • C. 

      235 Ib-ft

    • D. 

      0

  • 18. 
    Three forces act on the car. The sum of the forces is zero and the sum of the moments of the forces about point P is zero. Determine the forces A and B.
    • A. 

      A=933 lb, B=1867 lb

    • B. 

      A=1867 lb, B=933 lb

    • C. 

      A=1687 lb, B=933 lb

    • D. 

      A=1867 lb, B=339 lb

  • 19. 
    What is the sum of the moment about Q?
    • A. 

      1245 Ib-ft

    • B. 

      0

    • C. 

      1425 Ib-ft

    • D. 

      None of the above

  • 20. 
    Three loads are applied to a beam as shown. The beam is supported by a roller at A and by a pin at B. Neglecting the weight of the beam, determine the reaction at A when P=15 kips.
    • A. 

      6.00 kips

    • B. 

      4.00 kips

    • C. 

      7.00 kips

    • D. 

      5.00 kips

  • 21. 
    What is the magnitude of the x component of the reactions at B?
    • A. 

      6.00 kips

    • B. 

      0

    • C. 

      4.00 kips

    • D. 

      5.00 kips

  • 22. 
    Determine the vertical component of the reaction on the beam caused by the rocker at A.
    • A. 

      931 N

    • B. 

      913 N

    • C. 

      391 N

    • D. 

      319 N

  • 23. 
    Determine the vertical component of the reaction on the beam caused by the pin at B.
    • A. 

      405 N

    • B. 

      505 N

    • C. 

      540 N

    • D. 

      450 N

  • 24. 
    What is the reaction of the rocker B on the beam?
    • A. 

      4.46 kN

    • B. 

      3.46 kN

    • C. 

      5.46 kN

    • D. 

      6.46 kN

  • 25. 
    Determine the horizontal component of reaction at the pin A
    • A. 

      1.83 kN

    • B. 

      2.73 kN

    • C. 

      1.73 kN

    • D. 

      3.73 kN

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