A plane is traveling at 200 m/s following the arc of a vertical circle of radius R.At the top of its path, the passengers experience "weightlessness." To one significant figure, what is the value of R? 
Definitions:
Positive Psychology
A branch of psychology focused on the study and enhancement of positive human functions, well-being, and flourishing.
Humanistic Psychology
A psychological perspective that emphasizes personal growth, self-actualization, and the inherent worth of individuals.
Optimism
An attitude characterized by the expectation that outcomes of events or experiences will generally be positive.
Clinical Psychologists
Professionals specializing in diagnosing and treating mental, emotional, and behavioral disorders through a variety of methods including therapy.
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