A Coin Is Placed on a Horizontal Phonograph Turntable

question 7

Multiple Choice

A coin is placed on a horizontal phonograph turntable.Let N be the normal force exerted by the turntable on the coin, f be the frictional force exerted by the turntable on the coin, and f_{s, max} be the maximum force of the static friction.The speed of the turntable is increased in small steps.If the coin does not slide, then

• A)N increases, f increases, and f_{s, max} stays the same
• B)N increases, f increases, and f_{s, max} increases
• C)f increases and both N and f_{s, max} stay the same
• D)N, f, and f_{s, max} all stay the same
• E)N, f, and f_{s, max} all increase

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Definitions:

Temporal Process

A projection on the zygomatic bone that helps form the zygomatic arch, connecting the zygomatic bone to the temporal bone of the skull.

Lumbar

Pertaining to the lower part of the back or the five vertebrae in the lower spine.

Cervical

Pertaining to the neck or cervix in the human body.