[单选题]
An ice skater performs a piro-x r:pty3n*exgvwl (:uette (aoe*ea bta+w(s8iw 9* al0i f.h fast spin) by pulling in his outstretched arms close to his ofl .0ea*eba9ii8*wwtas h (+body. What happens to his rotational kinetic energy about the axis of rotation?
A. It does not change.
B. It increases.
C. It decreases.
D. It changes, but it is impossible to tell which way.
Post time 2024-1-22 02:51:16