Word Count : 272

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प्रारंभ में मेरी-गो-राउंड विरामावस्था में है, अतः कुल कोणीय संवेग शून्य है। जब बच्ची चलना शुरू करती है तब बाहरी कोणीय बलाघूर्ण शून्य होने के कारण कुल कोणीय संवेग संरक्षित रहेगा। बच्ची का द्रव्यमान 30 kg है और वह 3.00 m त्रिज्या पर 2.0 m ___ __________ _________ _____ ______ ________ ________.
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