ch29-p039 - 39. We use Eq. 29-13 and the superposition of...

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39. We use Eq. 29-13 and the superposition of forces: G G G G FFF F 4 1 42 43 4 =++ . With θ = 45°, the situation is as shown on the right. The components of G F 4 are given by 22 2 00 0 44 3 4 2 cos 45 3 cos 24 x ii i FF F aa a µ µµ ° =− ππ π and 2 0 1 4 2 sin 45 sin . y i F a ° = = π Thus, () 12 2 2 0 444 4 10 4 T m A 7.50A 31 0 4 4 4 4 0.135m 1.32 10 N/m xy i a π ⎡⎤ ×⋅ ⎛⎞ ⎢⎥ =+ = + = = ⎜⎟ ⎝⎠ ⎣⎦ −7 π1 0 π and G F 4 makes an angle φ with the positive x axis, where = F H G I K J F
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