Final answer:
In a physics problem involving two people carrying a plank, equilibrium is reached when the plank is evenly distributed between them.
Step-by-step explanation:
In a physics problem involving two people carrying a plank, equilibrium is reached when the plank is evenly distributed between them.
Option B) The plank is evenly distributed between them is the correct answer. When the weight of the plank is evenly distributed between the two people, there is no net torque acting on the plank and it remains in a state of static equilibrium.