MCQ
For given systen ${\theta _1}$ ....... $^o$
- A$30$
- ✓$45$
- C$60$
- D${\tan ^{ - 1}}\left( {\frac{1}{2}} \right)$
✓
Answer
Correct option: B.
$45$
b
$\frac{{{T_1}\sin {\theta _1}}}{{{T_1}\cos {\theta _1}}} $ =$ \frac{{mg}}{{mg}}$ $\therefore $
$\frac{{{T_1}\sin {\theta _1}}}{{{T_1}\cos {\theta _1}}} $ =$ \frac{{mg}}{{mg}}$ $\therefore $
$\tan {\theta _1} = 1$or ${\theta _1} = 45^\circ $
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