A 300-M-Long Ladder, Weighing 200 N, Leans Against a Smooth Vertical

question 75

Multiple Choice

A 3.00-m-long ladder, weighing 200 N, leans against a smooth vertical wall with its base on a horizontal rough floor, a distance of 1.00 m away from the wall. The ladder is not completely
Uniform, so its center of gravity is 1.20 m from its base. What force of friction must the floor exert
On the base of the ladder to prevent the ladder from sliding down?

• A) 93.3 N
• B) 150 N
• C) 28.3 N
• D) 130 N
• E) 102 N

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Definitions:

DSM-5

A crucial resource for healthcare providers, the Diagnostic and Statistical Manual of Mental Disorders, Fifth Edition, acts as an official guide for the diagnosis of mental illnesses.

Developmental Coordination

A disorder characterized by difficulty in acquiring motor skills, affecting a child's coordination and execution of movements.

Motor Skills

Abilities required to control the small and large movements of the body.

Specific Learning Disorders

Neurodevelopmental disorders that manifest in childhood as significant difficulties in learning and using academic skills, which may include reading, writing, or arithmetic.