[单选题]
An ice skater performs a pirouette (a fast spin) ok(a)k ::zj mn*p 8mwv/t k+jnby pull 7am 1 k3-v9zgy *pr-i(vsceeeing in his outstretched arms close to his body. What happens to his moment of inertia about the avyi1 ( gs7e 3*ap-cmkve9r-e zxis 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