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A body P starts from rest with an acceleration `a_(1)`. After 2 seconds, another body Q starts from rest with an acceleration `a_(2)` from the same point. If they travel equal distances in the fifth second after starting of the motion of the P, then the ratio `a_(1) : a_(2)` is equal toA. `5 : 9`B. `5 : 7`C. `9 : 5`D. `9 : 7` |
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Answer» Correct Answer - A As given in the questions, `(a_(1))/(2) (2 xx 5 - 1) = (a_(2))/(2) (2 xx 3 - 1)` `rArr (a_(1))/(a_(2)) = (5)/(9)` |
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