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

क्षैतिज से \(42^{\circ}\) तथा \(48^{\circ}\) पर समान प्रारम्भिक वेग से प्रक्षेपित दो प्रक्षेप्यों का परास तथा ऊँचाई क्रमशः \(R _{1}, R _{2}\) तथा \(H _{1}, H _{2}\) हैं। सत्य विकल्प चुनिये।

  1. A \({R}_{1}>{R}_{2}\) तथा \({H}_{1}={H}_{2}\)
  2. B \({R}_{1}={R}_{2}\) तथा \({H}_{1}<{H}_{2}\)
  3. C \({R}_{1}<{R}_{2}\) तथा \({H}_{1}<{H}_{2}\)
  4. D \({R}_{1}={R}_{2}\) तथा \({H}_{1}={H}_{2}\)
Verified Solution

Answer & Solution

Correct Answer

(B) \({R}_{1}={R}_{2}\) तथा \({H}_{1}<{H}_{2}\)

Step-by-step Solution

Detailed explanation

Range \({R}=\frac{{u}^{2} \sin 2 \theta}{{g}}\) and same for \(\theta\) and \(90-\theta\) So same for \(42^{\circ}\) and \(48^{\circ}\) Maximum height \({H}=\frac{{u}^{2} \sin ^{2} \theta}{2 {g}}\) \({H}\) is high for higher \(\theta\) So \({H}\) for \(48^{\circ}\) is higher…
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