A Ball Is Projected Upward at Time T = 0

question 7

Multiple Choice

A ball is projected upward at time t = 0.0 s,from a point on a roof 90 m above the ground.The ball rises,then falls and strikes the ground.The initial velocity of the ball is if air resistance is negligible.The time when the ball strikes the ground is closest to

• A) 9.4 s.
• B) 9.0 s.
• C) 8.7 s.
• D) 9.7 s.
• E) 10 s.

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Definitions:

Reward Deficiency Syndrome

A theory proposing that individuals with certain genetic backgrounds have deficiencies in the pleasure centers of the brain.

Substance-Induced Dementia

Cognitive impairment and memory issues directly attributable to the prolonged use of psychoactive substances, including drugs and alcohol.

Korsakoff's Syndrome

A chronic memory disorder typically associated with heavy alcohol consumption over a long period, characterized by short-term memory loss, "making up" stories (confabulation), and apathy.

Wernicke's Encephalopathy

A serious neurological disorder caused by thiamine (vitamin B1) deficiency, typically associated with chronic alcoholism, characterized by confusion, unsteady gait, and eye movement abnormalities.