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Standard XII

Physics

Net Force

The disc depi...

Question

The disc depicted above is in equilibrium.
Which statement about the Forces acting on the disc is TRUE?

All three forces must be the same

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F_{1} = F_{3}

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F_{1} = F_{2}

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F_{2} = F_{3}

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None of the forces are the same

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Solution

The correct option is C $F_{2} = F_{3}$
Since the system is in translational equilibrium, net force acting in horizontal direction is zero.
$⟹ F_{1} = F_{2} + F_{3}$
Also since the system is in rotational equilibrium, net torque about the center is zero.
$⟹ F_{2} . r = F_{3} . r$
$⟹ F_{2} = F_{3}$
Correct answer is option D.

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The disc depicted above is in equilibrium.Which statement about the Forces acting on the disc is TRUE?

The correct option is C F2=F3Since the system is in translational equilibrium, net force acting in horizontal direction is zero.⟹F1=F2+F3Also since the system is in rotational equilibrium, net torque about the center is zero.⟹F2.r=F3.r⟹F2=F3Correct answer is option D.

The disc depicted above is in equilibrium.
Which statement about the Forces acting on the disc is TRUE?