Multiple-Object Systems with Friction: a 4

question 38

Multiple Choice

Multiple-object systems with friction: A 4.00-kg box sits atop a 10.0-kg box on a horizontal table. The coefficient of kinetic friction between the two boxes and between the lower box and the table is 0.600, while the coefficient of static friction between these same surfaces is 0.800. A horizontal pull to the right is exerted on the lower box, as shown in the figure, and the boxes move together. What is the friction force on the UPPER box?

• A) 19.3 N to the right
• B) 19.3 N to the left
• C) 23.5 N to the right
• D) 31.4 N to the right
• E) 31.4 N to the left

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Definitions:

Anorexia Nervosa

A psychological and potentially life-threatening eating disorder characterized by an intense fear of gaining weight and a distorted body image, leading to severe restrictions on food intake and energy use.

Axis 1 Disorders

Clinical disorders that include major mental disorders, learning disorders, and substance use conditions in the DSM-IV classification.

Oral Stage

The first stage in Freud's psychosexual development theory, occurring in the first year of life, where pleasure is centered on oral activities such as sucking and eating.

Fixated

Obsessively focused or attached to someone or something in an immature psychological state.