The three 200 g masses in the figure below are connected by massless, rigid rods. (a) What is the triangle's moment of inertia about the axis through the center? (b) What is the triangle's kinetic energy if it rotates about the axis at 5.0 rev/s? ( 40 cm 40 cm Аxis 60° 60 40 сm

The three 200 g masses in the figure below are connected by massless, rigid rods. (a) What is the triangle's moment of inertia about the axis through the center? (b) What is the triangle's kinetic energy if it rotates about the axis at 5.0 rev/s? ( 40 cm 40 cm Аxis 60° 60 40 сm

Physics for Scientists and Engineers: Foundations and Connections

1st Edition

ISBN:9781133939146

Author:Katz, Debora M.

Publisher:Katz, Debora M.

Chapter13: Rotation Ii: A Conservation Approach

Section: Chapter Questions

Problem 23PQ

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Concept explainers

Angular speed, acceleration and displacement

Angular acceleration is defined as the rate of change in angular velocity with respect to time. It has both magnitude and direction. So, it is a vector quantity.

Angular Position

Before diving into angular position, one should understand the basics of position and its importance along with usage in day-to-day life. When one talks of position, it’s always relative with respect to some other object. For example, position of earth with respect to sun, position of school with respect to house, etc. Angular position is the rotational analogue of linear position.

Question

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The three 200 g masses in the figure below are connected by massless, rigid rods. (a) What is the triangle's
moment of inertia about the axis through the center? (b) What is the triangle's kinetic energy if it rotates
about the axis at 5.0 rev/s? (
40 cm
40 cm
Axis
60°
60
40 cm

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