(4\sqrt{2} N, 000°)
(4\sqrt{2} N, 045°)
(4\sqrt{2} N, 090°)
(4\sqrt{2} N, 180°)
Correct answer is B
F_{1} = (7i + 8j)N ; F_{2} = (3i + 4j)N
|F_{1} - F_{2}| = |(7i + 8j) - (3i + 4j)| = |4i + 4j|
|4i + 4j| = \sqrt{4^{2} + 4^{2}} = \sqrt{32} = 4\sqrt{2}
\tan \theta = \frac{y}{x} = \frac{4}{4} = 1
\theta = \tan^{-1} 1 = 045°
= (4\sqrt{2} N, 045°)
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