[填空题]
A cyclist accelerates frq 9zl76nh3axg8;ms3efwa; s oom l*qzj2w j4 0-d k (ass9aoiwb2rest at a rate of 1 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.] $m/s$