Two Billiard Balls Undergo a Glancing Collision

question 81

Multiple Choice

Two billiard balls undergo a glancing collision.Before the collision the first ball was travelling east at 2.6 m/s and the second ball was travelling west at 1.2 m/s.After the collision the second ball is deflected by +90 degrees travelling north at 1.47 m/s.Working in a coordinate system where +x direction is east and +y direction is north,what is the direction of the first ball after the collision?

• A)46.4º south of east
• B)43.6º south of east
• C)46.4º south of west
• D)43.6º south of west

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Definitions:

Maintenance Rehearsal

A method of keeping information in short-term memory by mentally repeating it.

Episodic Memories

Episodic memories are a type of long-term memory that involve the recollection of specific events, situations, and experiences, including the context and emotions associated with them.

Semantic Memories

Memories of general knowledge and facts about the world, independent of personal experience.

Working Memories

A mental system with limited space designated for momentarily keeping data accessible for manipulation.