Under Which of the Following Conditions Can a Ladder Standing

question 17

Multiple Choice

Under which of the following conditions can a ladder standing on a frictionless horizontal floor and leaning against a rough vertical wall be in equilibrium?

• A)The normal force exerted by the floor on the ladder equals the normal force the wall exerts on the ladder.
• B)The weight of the ladder is equal in magnitude to the frictional force the wall exerts on the ladder.
• C)A ladder in this situation cannot be in equilibrium.
• D)The normal force exerted by the floor on the ladder equals the weight of the ladder.
• E)The normal force exerted by the floor on the ladder equals the frictional force the wall exerts on the ladder.

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