An Object Moves Around a Circle

question 18

Multiple Choice

An object moves around a circle. If the radius is doubled keeping the speed the same then the magnitude of the contripetal force must be:

• A) twice as great
• B) half as great
• C) four times as great
• D) one-fourth as great
• E) the same

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Definitions:

Myelination

The process of forming a myelin sheath around the nerves to increase the speed at which electrical impulses are conducted.

Axons

Long, threadlike part of a nerve cell along which impulses are conducted from the cell body to other cells.

Action Potential

A rapid and temporary electrical signal that travels along the membrane of a neuron, facilitating neurotransmission.

Impulse Control

The ability to resist or delay an impulse, drive, or temptation to act and is a component of self-regulation.