Two Children Seat Themselves on a Seesaw

question 76

Multiple Choice

Two children seat themselves on a seesaw.The one on the left has a weight of 300 N while the one on the right weighs 200 N.The fulcrum is at the midpoint of the seesaw.If the child on the right is not at the end but is 1.50 m from the fulcrum and the seesaw is balanced,what is the torque provided by the weight of the child on the left? (Take ccw as positive. )

• A)-300 N·m
• B)300 N·m
• C)450 N·m
• D)-450 N·m
• E)​150 N·m

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Definitions:

Unconditioned Frustration Response

An innate emotional reaction to the blocking of a goal-directed behavior without prior conditioning.

Amsel

A reference to Abram Amsel, a psychologist known for his work on the frustration theory of learning.

Escape Behavior

An action taken to terminate an ongoing, unpleasant stimulus, effectively allowing an individual to avoid discomfort.

Drive

An internal motivational state created by physiological or psychological needs that drives an individual towards specific behaviors.