ch02 - MULTIPLECHOICE. 1 Whirlarock attheendof astringand...

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  MULTIPLE CHOICE.  Choose the one alternative that best completes the statement or answers the question.  1) 
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Whirl a rock  at the end of  a string and  it follows a  circular  path.  If the  string  breaks, the  tendency of  the rock is to 
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1)  _______  A)  c o n t i n u e   to  foll ow  cir cul ar  pat h.  f o ll ow a  straight - line path.   
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A sheet of  paper can be  withdrawn  from under a  container of  milk without  toppling it if  the paper is  jerked  quickly. This  best  demonstrate s that 
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2)  _______  A)  t h e   m i l car ton  has  ine rtia t h e r is an  action - reaction  pair of  forces. 
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gravity tends to hold the milk carton secure.  D) 
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the milk carton has no  acceleration.  E) 
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none of these    3) 
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An object  maintains its  state of  motion  because it  has 
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3)  _______  A)  m a ss.  s peed. 
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weight.  D) 
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acceleration.  E) 
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all of these    4) 
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According to  Newton's  law of  inertia, the  result of  walking  much of the  day is  similar to  tightening  the head of a  hammer  when its  handle hits a  solid surface  (Figure 2.2  in the text)  so that we  are actually  a little bit  shorter in  the 
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4)  _______  A)  e v eni ng.  m orning. 
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no difference, really    5) 
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A package  falls off a  truck that is  moving at 30  m/s.  Neglecting  air  resistance,  the  horizontal  speed of the  package just  before it hits  the ground is 
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5)  _______  A)  z e ro. m o re than  30 m/s. 
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less than 30 m/s but  larger than zero.  D) 
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about 30 m/s.  E) 
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