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:

Jurisdictional Strike

A strike action initiated by workers to contest the assignment of work tasks based on the boundaries of union agreements or trades.

Recognition Strike

A labor action taken by workers to gain acknowledgment from their employer regarding the legitimacy of their union or bargaining unit.

Economic Strike

A work stoppage conducted by employees to demand higher wages, better benefits, or improved working conditions, as opposed to strikes over rights or legal issues.

Sympathy Strike

A work stoppage by one union in support of a strike initiated by another union, typically to support the striking union's goals.