[填空题]
A cyclist accelerates from rest at a rate of 1z (yw::.qnqij a;moy.xlal1n.w),k0 b,stg 0 gi9figm/$s^2$ 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.] $m/s$
Post time 2025-2-18 20:00:22
