InterviewSolution
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InterviewSolution
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dy A starts from rest with an acceleration a1. After 2 seconds, another body B starts from rest with an acceleration a.If theytravel equal distances in the 5th second, after the start of A, then the ratio ai a2 is equal toA) 5: 9в) 5 : 7C)9:5D)9:7 |
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Answer» For the body ‘A’, the distance travelled in 5thsecond is, S5= 0 + ½ a1(2n - 1) => S5= 9/2 a1 [n = 5] For the body ‘B’, the distance travelled in the 5thsecond after the start of A is actually the distance travelled by the body B in the 3rdsecond, since, B starts 2 s later. Therefore, S3= 0 + ½ a2(2n - 1) => S3= 5/2 a2 [n = 3] Since, the distance travelled are same, 9/2 a1= 5/2 a2 => a1: a2= 5 : 9 |
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