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MHT CET 2023 (14 May, Shift 2) · Spring Systems

Spring Systems question from MHT CET 2023 (14 May, Shift 2)

Q50MHT CET 2023 · 14 MAY · SHIFT 2Medium

Spring Systems

A light spring is suspended with mass m1m_1 at its lower end and its upper end fixed to a rigid support. The mass is pulled down a short distance and then released. The period of oscillation is TT second. When a mass m2m_2 is added to m1m_1 and the system is made to oscillate, the period is found to be 32T\frac{3}{2}T. The ratio m1:m2m_1 : m_2 is

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Answer: (c)

  1. T∝mT \propto \sqrt{m}: (32)2=m1+m2m1\left(\frac{3}{2}\right)^2 = \frac{m_1+m_2}{m_1}.
  2. 94=1+m2m1⇒m2m1=54\frac{9}{4} = 1 + \frac{m_2}{m_1} \Rightarrow \frac{m_2}{m_1} = \frac{5}{4}
  3. So m1:m2=4:5m_1 : m_2 = 4 : 5, answer (c).
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