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Engineering Mechanics Test 1

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Engineering Mechanics Test 1
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  • Question 1
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    Two forces F1=i^+2y^+3x^ and F2=4i^+3y^x^ are acting on a rigid body. The component of F2 in direction of F1 is ______ N
    Solution

    Concept:

    Component of F2 in F1=F2cosθ

    Where,cosθ=F1.F2|F1||F2|

    Calculation:

    F1.F2=4+6+(3)=7

    |F1|=3.74N;|F2|=5.099N

    cos θ = 0.367

    ∴ F2 cos θ = 5.099 × 0.367

    F2 cos θ = 1.87 N

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