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JEE Mains · Physics · STD 11 - 3.1 vectors

\(A\) અને \(\frac{A}{2}\) નાં મૂલ્યો ધરાવતા બે બળો એકબીજાને લંબ છે. તેનું પરિણામીનું મૂલ્ય ...... છે.

  1. A \(\frac{\sqrt{5}\,A }{4}\)
  2. B \(\frac{5\,A }{2}\)
  3. C \(\frac{\sqrt{5}\,A ^2}{2}\)
  4. D \(\frac{\sqrt{5}\,A }{2}\)
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Answer & Solution

Correct Answer

(D) \(\frac{\sqrt{5}\,A }{2}\)

Step-by-step Solution

Detailed explanation

\(\overrightarrow{ F }=\left(\overrightarrow{ F }_1+\overrightarrow{ F }_2\right)\) \(|\overrightarrow{ F }|=\sqrt{ F _1^2+ F _2^2+2 F _1 F _2 \cos 90^{\circ}}\) \(=\sqrt{ A ^2+\frac{ A ^2}{4}}=\frac{ A \sqrt{5}}{2}\)
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