[填空题]
A cyclist accelerates f3bf*xab*8r c v0o( bp-cl r*xurom rest at a rate of 1 m/ voql76ld a n(k,g.f 7-sxk)lfn :mfowvbh05/$s^2$ 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.] $m/s$