The hard drive in a laptop computer or some MP3 players contains one or more platters (spinning
Question:
The hard drive in a laptop computer or some MP3 players contains one or more platters (spinning disks), each having an angular speed of typically 10,000 rpm, a radius of 4.0 cm, and a mass of about 50 g.
(a) What is the kinetic energy of one platter?
(b) What is the angular momentum of one platter?
(c) Can you notice this angular momentum when you rotate your computer or MP3 player? Explain why or why not.
Step by Step Answer:
We can calculate the angular momentum and rotational kinetic energy of a disk from its moment of ine...View the full answer
College Physics Reasoning and Relationships
ISBN: 978-0840058195
2nd edition
Authors: Nicholas Giordano
Related Video
Angular movements are produced when the angle between the bones of joint changes. There are several different types of angular movements, including flexion, extension, hyperextension, abduction, adduction, and circumduction. Flexion, or bending, occurs when the angle between the bones decreases. Moving the forearm upward at the elbow or moving the wrist to move the hand toward the forearm are examples of flexion. The extension is the opposite of flexion in that the angle between the bones of a joint increase.
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