Question 144: Centre of Mass and Rotational Motion

Question

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 (Take g = 10 m/s$$^2$$)

Accepted Answer

Torque balance about ' $O$ '
$\frac{T}{2} 	imes 0.6=20 	imes 0.5+80 	imes 1$
$T 	imes 0.3=10+80=90$
$T=\frac{900}{3}=300 \mathrm{~N}$

Answer

90 N

Answer

240 N

Answer

30 N

Answer

300 N

Centre of Mass and Rotational Motion

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 (Take g = 10 m/s$^2$)

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