[填空题]
What is the angular momented,rbp8: d/fe w t7jz/u: u xo wzrv/g+ a7u;eh+ey9touk.;ki-m of a 0.210-kg ball rotating on the end of a thin string in a circle of raaxou.7hekz- e/;gt; 9kr+: +ywiuv uodius 1.10 m at an angular speed of 10.4 $rad/s$? $kg \cdot m^2$
