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JEE Mains · Physics · STD 11 - 3.2 motion in plane

मूल बिन्दु से \(t=0\) पर प्रक्षेपित एक प्रक्षेप की स्थिति \(t =2 \; s\) पर \(\overrightarrow{ r }=(40 \hat{i}+50 \hat{j})\; m\) से दी जाती है। यदि प्रक्षेप क्षैतिज से \(\theta\) कोण पर प्रक्षेपित किया गया था, तब \(\theta\) है ( \(g =10\; ms ^{-2}\) लें).

  1. A \({\tan ^{ - 1}}\frac{2}{3}\)
  2. B \({\tan ^{ - 1}}\frac{3}{2}\)
  3. C \({\tan ^{ - 1}}\frac{7}{4}\)
  4. D \({\tan ^{ - 1}}\frac{4}{5}\)
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Correct Answer

(C) \({\tan ^{ - 1}}\frac{7}{4}\)

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\begin{array}{l} \,\,\,\,\,\,\,\,\,From\,question,\\ \,\,\,\,\,\,\,\,\,Horizontal\,velocity\,\left( {initial} \right),\\ \,\,\,\,\,\,\,\,\,{u_x} = \frac{{40}}{2} = 20m/s\\ \,\,\,\,\,\,\,\,\,Vertical\,velocity\,\left( {initial} \right),\\ \,\,\,\,\,\,\,\,\,\,50 = {u_y}t +…

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