ExamBro
ExamBro
WBJEE · Physics · Laws of Motion

A simple pendulum, consisting of a small ball of mass \(m\) attached to a massless string hanging vertically from the ceiling, is oscillating with an amplitude such that \(T_{\max }=2 T_{\min }\) where \(T_{\max }\) and \(T_{\min }\) are the maximum and minimum tension in the string respectively. The value of maximum tension \(\mathrm{T}_{\max }\) in the string is

  1. A \(\frac{3 m g}{2}\)
  2. B \(\mathrm{mg}\)
  3. C \(\frac{3 m g}{4}\)
  4. D \(3 \mathrm{mg}\)
Verified Solution

Answer & Solution

Correct Answer

(A) \(\frac{3 m g}{2}\)

Step-by-step Solution

Detailed explanation

\(\mathrm{T}_{\min }=m g \cos \theta\) \(\mathrm{T}_{\max }=\mathrm{mg}+\frac{\mathrm{mv}^{2}}{\mathrm{I}}=\mathrm{mg}+\frac{\mathrm{mv}^{2}}{\mathrm{I}}\) \(\frac{1}{2} \mathrm{mv}^{2}=\mathrm{mgl}(1-\cos \theta)\) \(\mathrm{T}_{\max }=2 \mathrm{~T}_{\min }\)…
Same subject
Explore more questions on app