8

Biology with MasteringBiologyâ„¢ (8th Edition)

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  MULTIPLE CHOICE.  Choose the one alternative that best completes the statement or answers the question.  1) 
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A uniform  sign is  supported at  P as shown  in the figure.  If the sign is  a square    on its  side and its  mass is   what  is the  magnitude  of the  horizontal  force that P  experiences?  
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1)  _______  A) 
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24 N 
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B) 
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34 N 
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C) 
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98 N 
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D)  0  N  
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A uniform  1200 N  beam that is  3.50 m long  is suspended  horizontally  by two  vertical  wires at its  ends. A  small but  dense 550 N  weight is  placed on  the beam  2.00 m from  one end, as  shown in the  figure. The  tensions, A  and B, in the  two wires  are:  
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2)  _______  A)  A   =   9 1 4  N,  = 83 =  8 960 N, B  =  8190 
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=  8190 N, B  =  8960  N  D) 
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=  875 N, B  =  875 N  E) 
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=  836 N, B  =  914 N      3) 
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A uniform  200 kg  beam, 6 m  long, is  freely  pivoted at P.  The beam is  supported in  a horizontal  position by a  light strut, 5  m long,  which is  freely  pivoted at Q  and is  loosely  pinned to the  beam at R. A  load of mass  is suspended  from the end  of the beam  at S. A  maximum  compression  of    in the strut is  permitted,  due to  safety. In the  figure, the  maximum  mass M of  the load is  closest to: 
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3)  _______  A)  1 3 75  kg  9 20 kg 
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1120 kg  D) 
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665 kg  E) 
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1175 kg    4) 
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A uniform  600 kg  beam, 6 m  long, is  freely  pivoted at P.  The beam is  supported in  a horizontal  position by a  light strut, 5  m long,  which is  freely  pivoted at Q  and is  loosely  pinned to the  beam at R. A  load of mass  is suspended  from the end  of the beam  at S. A  maximum  compression  of    in the strut is  permitted,  due to  safety. In the  figure, under  maximum  load, the    of the force  exerted on  the beam by  the pivot at  P is closest  to: 
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4)  _______  A)  1 2 , 60 1 4,400 N 
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16,200 N  D) 
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18,000 N  E) 
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10,800 N    5) 
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A uniform  600 kg  beam, 6 m  long, is  freely  pivoted at P.  The beam is  supported in  a horizontal  position by a  light strut, 5  m long,  which is  freely  pivoted at Q  and is  loosely  pinned to the  beam at R. A  load of mass  is suspended  from the end  of the beam  at S. A  maximum  compression  of    in the strut is  permitted,  due to  safety. In the  figure, under  maximum  load the    of the force  exerted on  the beam by  the pivot at  P is closest  to: 
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5)  _______  A)  1 0 , 00 9 560 N 
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zero  D) 
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4560 N  E) 
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7060 N    6) 
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A small  branch is  wedged  under a rock  and rests on  a smaller  object. The 
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This document was uploaded on 04/16/2010.

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