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in Physics by (122k points)
एक गेंद एक दीवार पर अभिलंब से 8@, कोण बनाते हुए किसी वेग से टकराती है और इससे 6@, कोण बनाते हुए वापस लौटती है। यद टक्कर पूर्ण प्रत्यास्थ हो, तो
A. `theta_(1)=theta_(2)`
B. प्रारंभिक संवेग = अंतिम संवेग
C. प्रारंभिक गतिज ऊर्जा = अंतिम गतिज ऊर्जा
D. प्रारंभिक बेग = अंतिम बेग

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