Three Railway Cars of Equal Mass Are on the Same

question 18

Multiple Choice

Three railway cars of equal mass are on the same (frictionless) track. The one on the left is moving with velocity V toward the other two which are stationary. As the cars undergo successive collisions, they couple and move together. What is the velocity of the final configuration of the three coupled cars?

• A)V
• B)V/2
• C)V/3
• D)V/4

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Definitions:

Cognitive-Behavioural Therapy

A psychotherapeutic treatment that helps patients understand the thoughts and feelings that influence behaviors, aiming to change negative thought patterns and behaviors.

Behavioural Activation

A therapy approach that focuses on engaging patients in activities that are aligned with their values and interests to combat depression and other mental illnesses.

Interpersonal Psychotherapy

A short-term, attachment-focused psychotherapy that addresses interpersonal issues in depression, emphasizing problem-solving relationships and social roles.

Pharmacotherapy

The management of illness by administering medication.