[填空题]
(I) How much work did the movers do (xtxit.a7 m+ m,jld(-(.yhzvghorizontally) pushing a 160-kg cratdik m.e3 pv1bn9/b3 qbmh*7xue 10.3 m across a rough floor without acceleration, if the eb m 91b mibq7xp.k*3/hdneuv3 ffective coefficient of friction was 0.50? J
