[填空题]
A cyclist accelerates from rest at a rate of 6 f 3lkql8l d;arxl7u+1: od:qoih p4xx0l j:9jubk+ 4n m/$s^2$ How fast will a point on the rim of the tire at the top be moving after 3.0 s? [Hint: At any moment, the lowest point on the tire is in contact with the ground and is at rest — see Fig. 8–51.] $m/s$
