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posted by  Confusedd on 11/5/2009 2:43:45 AM  |  status: Live  |  Earned Karma: 25

physics midterm tomorrow!

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Algebra Based Physics College Physics (8th) by Young N/A N/A 11/4/2009 at 11:59:00 PM
Question Details:
The only forces acting on a body have magnitudes of 20 N and 35 N and directions that differ by 80 degrees. The resulting acceleration has a magnitude of 20 m/s2. What is the approximate mass of the body?
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posted by Kevin_08 on 11/5/2009 2:53:41 AM  |  status: Live
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Response Details:
  The resultant force is
         F = √[F12+F22 + 2F1F2 cosθ]
  Here F1 = 20N and F2 = 35N
            θ = 80o
     From the Newton's second law
         F =ma
   The mass of the body is
              m = F/a
  Here a = 20 m/s2
 
 Substitute the values for m.
I hope this helps! Best of luck with the rest of your coursework.
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