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4. If momentum of an object is increased by 10% then its kinetic energy will increase by (1) 20%(2) 21%(3) 40%(4) 19% |
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Answer» 2/2mpercentage change in ENEGY ={{(100+n) /100}^2-1}×100...where n=10 ..we have ANS as 21 ...this is SHORTCUT formula..so be alert |
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