MCQ
In the given figure force on wire $ABC$ will be $(B = 2T)$
- A$4(3+2\pi ) N$
- ✓$20\,N$
- C$10\,N$
- D$40\,N$
✓
Answer
Correct option: B.
$20\,N$
b
Force an $\mathrm{AB}=\mathrm{BI} \ell=12 \mathrm{\,N}$ (upward)
Force an $\mathrm{AB}=\mathrm{BI} \ell=12 \mathrm{\,N}$ (upward)
Force on $\mathrm{BC}=16 \mathrm{\,N}$ (left)
so force on $\mathrm{ABC}=\sqrt{(12)^{2}+(16)^{2}}=20 \mathrm{\,N}$
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