Section 4.1 Force and Motion

Practice Test
      
  1.An object that has a force exerted on it is called __________.  
  a.   the agent  
  b.   the environment  
  c.   the system  
  d.   static  
  Hint    
      
  2.The unit of force in the SI system is the __________.  
  a.   quantum  
  b.   pascal  
  c.   newton  
  d.   magnum  
  Hint    
      
  3.A(n) __________ force acts on an object without touching it.  
  a.   equilibrium  
  b.   free-body  
  c.   net  
  d.   field  
  Hint    
      
  4.Newton's first law of motion states that __________.  
  a.   all forces come in pairs  
  b.   the acceleration of an object is proportional to the net force exerted on the object and can be stated as the equation a = Fnet/m.  
  c.   objects remain either at rest or continue moving in a straight line with constant speed only if the net force on that object is zero  
  d.   air does not exert a force  
  Hint    
      
  5.The specific, immediate cause of a force is called the __________.  
  a.   contact  
  b.   agent  
  c.   system  
  d.   origin  
  Hint    
      
  6.The vector sum of two or more forces on an object is called the __________ force.  
  a.   resistant  
  b.   effort  
  c.   net  
  d.   composite  
  Hint    
      
  7.A(n) __________ force acts on an object only by touching it.  
  a.   tactile  
  b.   contact  
  c.   inert  
  d.   field  
  Hint    
      
  8.For the situation in Figure 4-5a, if F1 = 200 N and F2 = 500 N, what would Fnet be?  
  a.   300 N to the right  
  b.   700 N to the right  
  c.   700 N to the left  
  d.   300 N to the left  
  Hint    
      
  9.Newton's first law of motion is often called the law of __________.  
  a.   inertia  
  b.   momentum  
  c.   acceleration  
  d.   equilibrium  
  Hint    
      
  10.If the force used to generate the graph in Figure 4-3b were doubled, how, if at all, would the graph change?  
  a.   The y-intercept of the graph would be a non-zero number.  
  b.   The slope of the graph would be doubled.  
  c.   It would not change.  
  d.   The slope of the graph would be halved.  
  Hint    
      
  11.Newton's second law states that __________.  
  a.   a force is needed to keep an object moving  
  b.   all forces come in pairs  
  c.   the acceleration of an object is proportional to the net force exerted on the object  
  d.   objects remain either at rest or continue moving in a straight line with constant speed only if the net force on that object is zero  
  Hint    
      
  12.The net force is the __________.  
  a.   apparent weight  
  b.   force exerted on one surface by another when there is no relative motion between the two  
  c.   friction between any two objects  
  d.   vector sum of two or more forces on an object  
  Hint    
      
  13.For the situation in Figure 4-5a, if the table had a mass of 35 kg, and F1 = 20.0 N and F2 = 30.0 N, what would the acceleration be?  
  a.   1.4 m/s2 to the right  
  b.   0.70 m/s2 to the right  
  c.   0.28 m/s2 to the left  
  d.   3.5 m/s2 to the left  
  Hint    
      
  14.An object is in equilibrium when __________.  
  a.   three or more forces act on it  
  b.   the net force on it is zero  
  c.   the equilibrant is zero  
  d.   its acceleration is constant  
  Hint    
      
  15.An object that experiences a push or a pull has a(n) __________ exerted on it.  
  a.   force  
  b.   inertia  
  c.   system  
  d.   environment  
  Hint    

 
   
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