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Physics · SYSTEMS OF PARTICLES AND ROTATIONAL MOTION
हिन्दीIn the system shown in the figure , two equal and opposite forces of magnitude \( F \) act at the ends A and B of a light rod of length \( 2a \). Which of the following conditions correctly characterizes the equilibrium state of this rod?
Correct answer · Option 4
The rod is in translational equilibrium but not in rotational equilibrium.
Explanation
In Fig. 6.20(b), the net force is \( \sum \mathbf{F} = \mathbf{F} + (-\mathbf{F}) = 0 \), ensuring translational equilibrium. However, both forces produce torques in the same anticlockwise sense about the midpoint C, so the net torque is \( \sum \tau = 2Fa \neq 0 \), meaning it is not in rotational equilibrium.
