An Object Moves in a Circle at Constant Speed

question 31

Multiple Choice

An object moves in a circle at constant speed.The work done by the centripetal force is zero because:

• A)the displacement for each revolution is zero
• B)the average force for each revolution is zero
• C)there is no friction
• D)the magnitude of the acceleration is zero
• E)the centripetal force is perpendicular to the velocity

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Definitions:

Master Gland

Often referred to the pituitary gland, it regulates crucial body functions and other endocrine glands.

Pituitary Gland

A pea-sized gland located at the base of the brain, crucial for regulating vital body functions and general wellbeing through hormone secretion.

Neuroendocrine Cells

Neurons that produce neurohormones.

Neurohormones

Hormones produced by neuroendocrine cells; transported down axons and released into interstitial fluid; common in invertebrates; in vertebrates, the hypothalamus produces neurohormones.