[填空题]
A 3800-kg open railroad car vlta749ylf flve3e ) 8coa 70z yb7 6ggqd.u4p6ovikyc*asts along with a constant speed of 8.6m/s on a level track. Snow begins to fall vertically and fills the car at a rate of 3.5kg/min Ignoring friction with the trau*g06g.d kp aq4c7ovyy7i6z bcks, what is the speed of the car after 90.0 min?$\approx$ m/s