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JEE Mains · Physics · STD 11 - 5. work,energy,power and collision

तीन पिंड \(A, B\) और \(C\) की गतिज ऊर्जाएँ समान हैं तथा उनके द्रव्यमान क्रमशः \(400 \mathrm{~g}, 1.2 \mathrm{~kg}\) और \(1.6 \mathrm{~kg}\) हैं। उनके रेखीय संवेगों का अनुपात _______ है।

  1. A \(1: \sqrt{3}: 2\)
  2. B \(1: \sqrt{3}: \sqrt{2}\)
  3. C \(\sqrt{2}: \sqrt{3}: 1\)
  4. D \(\sqrt{3}: \sqrt{2}: 1\)
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Answer & Solution

Correct Answer

(A) \(1: \sqrt{3}: 2\)

Step-by-step Solution

Detailed explanation

\(\mathrm{KE}=\frac{\mathrm{P}^2}{2 \mathrm{~m}}\) \(\mathrm{P} \propto \sqrt{\mathrm{m}}\) अतः, \(\mathrm{P}_{\mathrm{A}}: \mathrm{P}_{\mathrm{B}}: \mathrm{P}_{\mathrm{C}}\) \(=\sqrt{400}: \sqrt{1200}: \sqrt{1600}=1: \sqrt{3}: 2\)
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