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anonymous

  • one year ago

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

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    • one year ago
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    |dw:1435590682033:dw|

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    @ms.hi @lex.mcgrew @sweetpeagirl

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    @SolomonZelman can you please help

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    not sure how to do this

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    @kashthesmartguy

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    @Kash_TheSmartGuy

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    • one year ago
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    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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