Initially spring is relaxed and m is released from rest When m come to rest for a moment string AB is cut at the same moment

Question

Initially spring is relaxed and m is released from rest When m come to rest for a moment string AB is cut at the same moment Find the acceleration of m just after cutting the thread A a m m 20 B a 2m m 000000 m m B A C a m 2m 3m 3m2 1 D a

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