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5.A body A starts from rest with an acce...

5.A body A starts from rest with an acceleration "a_(1)".After two seconds,another body B starts from rest with an acceleration "a_(2)".If they travel equal distances in the "5" th second after the start of "A",then the ratio of "a_(1):a_(2)" is equal to 1) "5:9," 2) "9:5," 3) "5:7," 4) "7:5"

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