Conditions for equilibrium in rigid bodies

Steps:

• Identify net force and net torque for each object.
• For translational equilibrium, net force must be zero.
• For rotational equilibrium, net torque must be zero.
• Determine which diagram shows both conditions satisfied.

Why D is correct:

• Option D has balanced forces (net force = 0) and torques (net torque = 0), per Newton's first law for rigid bodies.

Why the others are wrong:

• A: Net force nonzero, causes translation.
• B: Net torque nonzero, causes rotation.
• C: Both net force and torque nonzero.

Not enough information on diagrams to confirm details.

Final answer: D