A Ball Is Projected Upward at Time T = 0

question 83

Multiple Choice

A ball is projected upward at time t = 0 s,from a point on a flat roof 10 m above the ground.The ball rises and then falls with insignificant air resistance,missing the roof,and strikes the ground.The initial velocity of the ball is 58.5 m/s. Consider all quantities as positive in the upward direction.At time t= 5.97 s, The vertical velocity of the ball is closest to

• A)0 m/s.
• B)+175 m/s.
• C)+12 m/s.
• D)-175 m/s.
• E)-12 m/s.

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Definitions:

Reaction Formation

A defense mechanism where unacceptable impulses are transformed into their opposite in one's consciousness.

Repression

A defense mechanism in psychoanalytic theory where uncomfortable thoughts, memories, or desires are pushed out of conscious awareness.

Topographical Model

A Freudian theory in psychology which divides the human mind into the conscious, preconscious, and unconscious parts.

Conscious

Refers to the awareness of one's own existence, sensations, thoughts, surroundings, and abilities.