Under which of the following conditions can a ladder standing on a rough horizontal floor and leaning against a rough vertical wall be in equilibrium? O A. The weight of the ladder is equal in magnitude to the frictional force the wall exerts on the ladder. В. The normal force exerted by the floor on the ladder equals the frictional force the wall exerts on the ladder. A ladder in this situation cannot be in equilibrium. D. The normal force exerted by the floor on the ladder equals the normal force the wall exerts on the ladder. O E. The normal force exerted by the floor on the ladder equals the weight of the ladder in magnitude and the friction force on the ladder on the floor is equal to force exerted by the wall on the ladder in magnitude.

Under which of the following conditions can a ladder standing on a rough horizontal floor and leaning against a rough vertical wall be in equilibrium? O A. The weight of the ladder is equal in magnitude to the frictional force the wall exerts on the ladder. В. The normal force exerted by the floor on the ladder equals the frictional force the wall exerts on the ladder. A ladder in this situation cannot be in equilibrium. D. The normal force exerted by the floor on the ladder equals the normal force the wall exerts on the ladder. O E. The normal force exerted by the floor on the ladder equals the weight of the ladder in magnitude and the friction force on the ladder on the floor is equal to force exerted by the wall on the ladder in magnitude.