Answered: Each blade on a rotating airplane…

Elements Of Electromagnetics

7th Edition

ISBN:9780190698614

Author:Sadiku, Matthew N. O.

Publisher:Sadiku, Matthew N. O.

ChapterMA: Math Assessment

Section: Chapter Questions

Problem 1.1MA

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Question

Each blade on a rotating airplane
propeller is like a long, thin rod. If each
blade were stretched to double its length
(while the mass of each blade and the
propeller’s angular speed stay the same), by
what factor would the kinetic energy of the
rotating blades increase? (i) 2; (ii) 4; (iii) 8;
(iv) the kinetic energy would not change;
(v) the kinetic energy would decrease, not
increase.

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