[填空题]
A cyclist accelerate6 tle1q,j( hk ;sn*dkgs from rest bgq99xdxt yf:d*o.dc+n5 h:6z- ko zvat 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.] $m/s$