A Puck with a Mass M₁ = 28

question 60

Multiple Choice

A puck with a mass m₁ = 28.0 g moving at 1.00 m/s approaches a stationary puck with a mass m₂ = 102 g on an air table and they undergo a two-dimensional elastic collision. As a result of their interaction, the incident puck moves away with a speed v₁ = 0.785 m/s and the other puck moves away with a speed v₂ in a different direction. What is the angle between the velocities v₁ and v₂?

• A) 45.0°
• B) 90.0°
• C) 85.0°
• D) 123°
• E) 165°

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Definitions:

Psychosexual Theory

A theory proposed by Freud that suggests that childhood sexual experiences significantly influence personality development.

Psychosocial Theory

A theory proposed by Erik Erikson that outlines eight stages of psychological development from infancy to late adulthood, each characterized by a specific conflict that contributes to a major aspect of personality.

Shaping Behavior

A method of positive reinforcement in psychology that gradually trains a new behavior by rewarding successive approximations of the desired behavior.

Ego

Part of Freud's psychoanalytic theory of personality, mediating between the demands of the id, the superego, and reality, and operating consciously and unconsciously to help the individual adapt.