anonymous
  • anonymous
Alicia draws a diagram to represent two forces, F1 and F2, acting on a body. The angle between the directions of the forces is 50° as shown in the diagram. Alicia notices that she can use the Law of Cosines to find the magnitude of the resultant force R in the diagram. What is the value of R? 120.1 N 78.0 N 70.7 N 38.5 N 45.0 N
Geography
schrodinger
  • schrodinger
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anonymous
  • anonymous
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anonymous
  • anonymous
anonymous
  • anonymous
@SolomonZelman can you please help

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anonymous
  • anonymous
not sure how to do this
anonymous
  • anonymous
anonymous
  • anonymous
anonymous
  • anonymous
Drop vertical line down from B, to same level as A, label this line BD BD = 38 sin(50) = 29.1 CD = 38 cos(50) = 24.4 AD = AC + CD = 40 + 24.4 = 64.4 Pythagoras next AB^2 = BD^2 + AD^2 AB = 70.7N

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