Page 165 - Fisika Terapan for Engineers and Scientists

CHAPTER

Rotation of a

Rigid Body 12

CONCEPTS IN CONTEXT
Concepts
in
Context This large centrifuge at the Sandia National Laboratory is used for test-
ing the behavior of components of rockets, satellites, and reentry vehicles 12.1 Motion of a Rigid Body
when subjected to high accelerations. The components to be tested are
12.2 Rotation about a Fixed Axis
placed in a compartment in one arm of this centrifuge; the opposite arm
12.3 Motion with Constant
holds a counterweight.The arms rotate at up to 175 revolutions per minute,
Angular Acceleration
and they generate a centripetal acceleration of up to 300g.
The concepts of this chapter permit us to answer several questions 12.4 Motion with Time-
Dependent Angular
about this centrifuge:
Acceleration
? How are the speed and the centripetal acceleration at the end of an 12.5 Kinetic Energy of Rotation;
arm related to the rate of rotation? (Example 5, page 373) Moment of Inertia
? How do we determine the resistance that the centrifuge offers to
changes in its rotational motion? (Example 12, part (a), page 383)
? How is the kinetic energy of the centrifuge arms related to the rate
of rotation? (Example 12, part (b), page 383)
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