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Two identical balls A and B are released...

Two identical balls A and B are released from the positions shown in figure. They collide elastically on horizontal position MN. The ratio of the heights attained by A and B after collision will be (neglect friction): 「不ちは 45° 60° N (a) 1:4 (c) 4:13 (b) 2:1 (d) 2:5

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