An object of mass 8 kg is hanging from one end of a uniform rod CD of mass 2 kg and length 1 m pivoted at its end C on a vertical wall as shown in figure. It is supported by a cable AB such that the system is in equilibrium. The tension in the cable is :
Select the correct option:
A
240 N
B
90 N
C
300 N
D
30 N
✓ Correct! Well done.
✗ Incorrect. Try again or view the solution.
Solution
ol.
Taking torque about point C
$$
\begin{array}{ll}
& \frac{\mathrm{T}}{2} \times 60=20 \times 50+80 \times 100 \\
\Rightarrow & 3 \mathrm{~T}=100+800 \\
\Rightarrow & =300 \mathrm{~N}
\end{array}
$$
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