A 012-Kg Ball Is Moving at 6

question 38

Multiple Choice

A 0.12-kg ball is moving at 6.0 m/s when it is hit by a bat,causing it to reverse direction and have a speed of 8.0 m/s.What is the magnitude of the change in the momentum of the ball?

• A) 0.39 kg m/s
• B) 0.42 kg m/s
• C) 1.7 kg m/s
• D) 2.4 kg m/s

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Definitions:

Altruism

A selfless concern for the well-being of others without expectation of reward or recognition.

Personal Gain

Pursuing actions or decisions primarily for self-benefit or personal advantage.

Cognitive Dissonance Theory

A concept in social psychology that describes the discomfort felt by an individual who holds contradictory beliefs, ideas, or values.

Attitudes

Psychological tendencies expressed by evaluating a particular entity with some degree of favor or disfavor.