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.

Elements Of Electromagnetics
7th Edition
ISBN:9780190698614
Author:Sadiku, Matthew N. O.
Publisher:Sadiku, Matthew N. O.
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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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