[填空题]
A cyclist acceleratesbin4 mrj gx6c(mnrgt+1j.z t19b.uh( from rest at a rat ( 357usx0ijwya,r2uy; ozsd1(ww stee 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.] $m/s$