A Block Slides Down a Frictionless Plane That Makes an Angle

question 50

Multiple Choice

A block slides down a frictionless plane that makes an angle of 30°with the horizontal.The acceleration of the block is:

• A)9.80 m/s²
• B)5.66 m/s²
• C)8.49 m/s²
• D)0 m/s²
• E)4.90 m/s²

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Definitions:

Repression

A defense mechanism where distressing thoughts, memories, or desires are unconsciously blocked from conscious awareness.

Ego

In psychoanalytic theory, the part of the personality responsible for dealing with reality by mediating between the id, superego, and the external world.

Displacement

in psychology, is a defense mechanism where a person redirects a negative emotion from its original source to a less threatening recipient.

Defense Mechanism

A psychological strategy unconsciously used by individuals to protect themselves from anxiety or to avoid facing uncomfortable truths.