A 300-Kg Ball Swings Rapidly in a Complete Vertical Circle of of Radius

question 17

Multiple Choice

A 3.00-kg ball swings rapidly in a complete vertical circle of radius 2.00 m by a light string that is fixed at one end.The ball moves so fast that the string is always taut and perpendicular to the velocity of the ball.As the ball swings from its lowest point to its highest point

• A) the work done on it by gravity and the work done on it by the tension in the string are both equal to -118 J.
• B) the work done on it by gravity is -118 J and the work done on it by the tension in the string is +118 J.
• C) the work done on it by gravity is +118 J and the work done on it by the tension in the string is -118 J.
• D) the work done on it by gravity is -118 J and the work done on it by the tension in the string is zero.
• E) the work done on it by gravity and the work done on it by the tension in the string are both equal to zero.

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Definitions:

Homeostat

A device or mechanism that regulates its internal environment to maintain a stable condition, mirroring the concept of homeostasis in biological systems.

Parasympathetic System

A division of the autonomic nervous system responsible for conserving energy and promoting restful states by slowing the heart rate, increasing intestinal and gland activity, and relaxing sphincter muscles.

Sympathetic System

Part of the autonomic nervous system that activates the body's response to stress, preparing the body for action.

Endocrine System

A collection of glands that produce hormones which regulate metabolism, growth and development, tissue function, sexual function, reproduction, sleep, and mood, among other things.