[单选题]
An ice skater performs mvey(2g(byjhu5 kysii 06 y8*a pirouette (a fazteo /n:nt ac;:wnbmr)*+0 f fst spin) by pulling in his outstretched arms close to his body. What happens to his rof:+fa)n tw; m/ernnzt *bo:c0tational 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