ch07-p067 - 67. (a) Noting that the x component of the...

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67. (a) Noting that the x component of the third force is F 3 x = (4.00 N)cos(60º), we apply Eq. 7-8 to the problem: W = [5.00 N – 1.00 N + (4.00 N)cos 60º](0.20 m) = 1.20 J.
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