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A mass 'M' is suspended from a spring of negligible mass. The spring is pulled a little and then released. It execuutes S.H. oscillations of period T. When mass is increased by 'm', the period becomes (5)/(4) T, the ratio (m)/(M) is : |
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Answer» `(9)/(16)` and `(5T)/(4)=2pi sqrt((M+m)/(k))""…(ii)` DIVIDING (ii) by (i) `:.""(5)/(4)=sqrt((M+m)/(M))""IMPLIES""(25)/(16)=(M+m)/(M)` `:.""(m)/(M)=(9)/(16)` Hence correct choice is (a). |
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