A Spool Whose Inner Core Has a Radius of 1

question 75

Multiple Choice

A spool whose inner core has a radius of 1.00 cm and whose end caps have a radius of 1.50 cm has a string tightly wound around the inner core. The spool is free to roll without slipping on a horizontal surface. If the string unwinds horizontally from the bottom of the core with a constant speed of 25.0 cm/s, what is the speed of the spool?

• A) 5.00 cm/s
• B) 15.0 cm/s
• C) 25.0 cm/s
• D) 37.5 cm/s
• E) 75.0 cm/s

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Definitions:

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Short, fine, usually unpigmented hair that covers the body except for the scalp, eyebrows, and eyelids. Much of the vellus is replaced at puberty by terminal hairs.

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A steroid hormone that plays a key role in the development of male reproductive tissues, as well as promoting secondary sexual characteristics.

Pigmented Hairs

Pigmented hairs are hairs that contain melanin, which gives hair its color, varying from person to person and changing with age.