A wheel is subjected to uniform angular acceleration about its ax… - Vidyadip

MCQ

A wheel is subjected to uniform angular acceleration about its axis. Initially its angular velocity is zero. In the first $2 sec$, it rotates through an angle $\theta_1$. In the next $2 sec$, it rotates through an additional angle $\theta_2$. The ratio of $\theta_2 / \theta_1$ is

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Answer

Correct option: A.

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(a)$m g=1 \times 10=10 N, \quad \frac{m v^2}{r}=\frac{1 \times(4)^2}{1}=16$Tension at the top of circle $=\frac{m v^2}{r}-m g=6 N$Tension at the bottom of circle $=\frac{m v^2}{r}+m g=26 N$

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