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posted by  gd_sd on 11/4/2009 8:25:03 PM  |  status: Closed  |  Earned Karma: 35

physics

Course Textbook Chapter Problem Needs by
N/A N/A N/A N/A 11/6/2009 at 11:00:00 PM
Question Details:
An object experiencing a constant force accelerates at 12 m/s.
What will the acceleration of this object be if the force is halved?
What will the acceleration of this object be if the mass is halved?
What will the acceleration of this object be if the force is halved and the mass is halved?
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posted by Kevin_08 on 11/4/2009 8:35:04 PM  |  status: Live
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Response Details:
  From Newton's second law
   F = ma
  Here a be the acceleration = 12 m/s2


 
 The acceleration of the object if the force is halved is
                 F/F'= (a/a')
   F' = F/2
               2 = a/a'
              a' = a/2
                 = 6 m/s2        ( since mass of the object is constant )
       So the acceleration of the object is
                          a' =6 m/s2  

  The acceleration of the object be if the mass is halved is
            
                (m'/m)= (a/a')
   m' = m/2
               1/2 = a/a'
              a' = 2a
                 = 24 m/s2     

  The acceleration of this object be if the force is halved and the mass is halved is
             F/F'= (a/a')(m/m')
   F' = F/2  and m' = m/2
            2 = 2 (a/a')
             a' = a
                 = 12 m/s2          


         
 

I hope this helps! Best of luck with the rest of your coursework.
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