In a conical pendulum, a string of length 120 ~cm is fixed at a r… - Vidyadip

Question

In a conical pendulum, a string of length $120 \mathrm{~cm}$ is fixed at a rigid support and carries a bob of mass $150 \mathrm{~g}$ at its free end. If the bob is revolved in a horizontal circle of radius $0.2 \mathrm{~m}$ around a vertical axis, calculate the tension in the string. $\left[\mathrm{g}=9.8 \mathrm{~m} / \mathrm{s}^2\right]$

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Answer

Data : $L=120 \mathrm{~cm}=1.2 \mathrm{~m}_{\mathrm{r}} \mathrm{m}=150 \mathrm{~g}=0.15 \mathrm{~kg}$,
$\mathrm{r}=0.2 \mathrm{~m}, \mathrm{~g}=9.8 \mathrm{~m} / \mathrm{s}^2$
$\sin \theta=\frac{r}{L}=\frac{0.2}{1.2}=\frac{1}{6}$

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