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3 किग्रा द्रव्यमान का एक बम का गोला हवा में दो भागो में 2 किग्रा व 1 किग्रा में फट जाता है । छोटा द्रव्यमान 80 मी /से की चाल से चल रहा है , दोनों टुकड़ो की कुल ऊर्जा है
A. ` 1.07` किलो जूल
B. `2.14 ` किलो जूल
C. ` 2.4` किलो जूल
D. `4.8` किलो जूल

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Correct Answer - D
दोनों टुकड़ो में समान संवेग उत्पन्न होता है ।
` :. M_(1) v_(1) = m_(2)v_(2)`
` rArr 1 xx 80 = 2 xx v_(2)`
` rArr v_(2) = 40 ` मी /से
` :. ` निकाय की कुल ऊर्जा ` = 1/2 m_(1)v_(1)^(2) + 1/2 m_(2)v_(2)^(2)`
` = 1/2 xx 1 xx (80)^(2) + 1/2 xx 2 xx (40)^(2)`
` = 4800 ` जूल = `4.8` किलो जूल

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