Wind energy is gaining increased attention, generating an increased interest in windmill technology. Because windmill blades (vanes) rotate about a central axis, one of the most important physical properties of a windmill is its moment of inertia. Given is a picture of a typical windmill, where the geometry and center of mass of one of the vanes is illustrated. The mass of each vane is 309 kg. The distance from the center of mass of the vane to axis B is k₁ = 3.35 m. The distance from the center of mass of the vane to the center of the windmill hub is k₂ = 5.19 m. If the moment of inertia of a vane about axis A is 445 kg-m² and about axis B is 10800 kg-m², calculate the moment of inertia Itotal of the entire assembly about the axis that passes through the windmill's hub and is perpendicular to the screen. (Ignore the hub and assume the vanes are flat.) Itotal = kg.m² Center of mass A B

Classical Dynamics of Particles and Systems
5th Edition
ISBN:9780534408961
Author:Stephen T. Thornton, Jerry B. Marion
Publisher:Stephen T. Thornton, Jerry B. Marion
Chapter11: Dynamics Of Rigid Bodies
Section: Chapter Questions
Problem 11.4P
icon
Related questions
Question
Wind energy is gaining increased attention, generating an
increased interest in windmill technology. Because windmill
blades (vanes) rotate about a central axis, one of the most
important physical properties of a windmill is its moment
of inertia.
Given is a picture of a typical windmill, where the geometry
and center of mass of one of the vanes is illustrated. The
mass of each vane is 309 kg. The distance from the center of
mass of the vane to axis B is k₁ = 3.35 m. The distance from
the center of mass of the vane to the center of the windmill
hub is k₂ = 5.19 m.
If the moment of inertia of a vane about axis A is 445 kg-m²
and about axis B is 10800 kg-m², calculate the moment of
inertia Itotal of the entire assembly about the axis that passes
through the windmill's hub and is perpendicular to the screen.
(Ignore the hub and assume the vanes are flat.)
Itotal =
kg-m²
Center
of mass
A
B
Transcribed Image Text:Wind energy is gaining increased attention, generating an increased interest in windmill technology. Because windmill blades (vanes) rotate about a central axis, one of the most important physical properties of a windmill is its moment of inertia. Given is a picture of a typical windmill, where the geometry and center of mass of one of the vanes is illustrated. The mass of each vane is 309 kg. The distance from the center of mass of the vane to axis B is k₁ = 3.35 m. The distance from the center of mass of the vane to the center of the windmill hub is k₂ = 5.19 m. If the moment of inertia of a vane about axis A is 445 kg-m² and about axis B is 10800 kg-m², calculate the moment of inertia Itotal of the entire assembly about the axis that passes through the windmill's hub and is perpendicular to the screen. (Ignore the hub and assume the vanes are flat.) Itotal = kg-m² Center of mass A B
If the moment of inertia of a vane about axis A is 445 kg⋅m²
and about axis B is 10800 kg-m², calculate the moment of
inertia Itotal of the entire assembly about the axis that passes
through the windmill's hub and is perpendicular to the screen.
(Ignore the hub and assume the vanes are flat.)
I total =
A strong wind blows such that the windmill begins to
rotationally accelerate.
What happens to the moment of inertia during this
increase in angular speed?
The moment of inertia does not change.
The moment of inertia decreases.
The moment of inertia increases.
kg.m²
Transcribed Image Text:If the moment of inertia of a vane about axis A is 445 kg⋅m² and about axis B is 10800 kg-m², calculate the moment of inertia Itotal of the entire assembly about the axis that passes through the windmill's hub and is perpendicular to the screen. (Ignore the hub and assume the vanes are flat.) I total = A strong wind blows such that the windmill begins to rotationally accelerate. What happens to the moment of inertia during this increase in angular speed? The moment of inertia does not change. The moment of inertia decreases. The moment of inertia increases. kg.m²
Expert Solution
trending now

Trending now

This is a popular solution!

steps

Step by step

Solved in 3 steps with 3 images

Blurred answer
Knowledge Booster
Center of mass of a system
Learn more about
Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, physics and related others by exploring similar questions and additional content below.
Similar questions
  • SEE MORE QUESTIONS
Recommended textbooks for you
Classical Dynamics of Particles and Systems
Classical Dynamics of Particles and Systems
Physics
ISBN:
9780534408961
Author:
Stephen T. Thornton, Jerry B. Marion
Publisher:
Cengage Learning
University Physics Volume 1
University Physics Volume 1
Physics
ISBN:
9781938168277
Author:
William Moebs, Samuel J. Ling, Jeff Sanny
Publisher:
OpenStax - Rice University
Glencoe Physics: Principles and Problems, Student…
Glencoe Physics: Principles and Problems, Student…
Physics
ISBN:
9780078807213
Author:
Paul W. Zitzewitz
Publisher:
Glencoe/McGraw-Hill
Principles of Physics: A Calculus-Based Text
Principles of Physics: A Calculus-Based Text
Physics
ISBN:
9781133104261
Author:
Raymond A. Serway, John W. Jewett
Publisher:
Cengage Learning
Physics for Scientists and Engineers: Foundations…
Physics for Scientists and Engineers: Foundations…
Physics
ISBN:
9781133939146
Author:
Katz, Debora M.
Publisher:
Cengage Learning