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Question: Answered & Verified by Expert
A pendulum having a bob of mass $m$ is hanging in a ship sailing along the equator form east to west. When the strip is stationary with respect to water, the tension in the string is $T_0$. The difference between $T_0$ and earth attraction on the bob, is
PhysicsLaws of MotionJIPMERJIPMER 2015
Options:
  • A $\frac{m g+m \omega^2 R}{2}$
  • B $\frac{m \omega^2 R}{3}$
  • C $\frac{m \omega^2 R}{2}$
  • D $m \omega^2 R$
Solution:
1249 Upvotes Verified Answer
The correct answer is: $m \omega^2 R$
Speed of ship due to rotation of the earth $v=\omega R$
The net force
$\begin{aligned} T_0 & =m g-m \omega^2 R \\ \Rightarrow \quad T_0-m g & =m \omega^2 R\end{aligned}$

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