1传送带的原形水平传送带长为L,其动摩擦因数为μ,运动速度保持恒定且为v0。现将质量为m的小物体无初速(度1)地因置物于体其m一端的存A,在如,图传1送-带1所示增。加求的:动力及动力持续的最短时间;(2)物体由A端到B端所经历的时间;(3)传送带上所留下的划痕长度;(4)因物体m的存在 1 Conveyor belt prototype horizontal conveyor length L, the dynamic friction coefficient μ, the speed of movement remains constant and v0. Now the mass of small objects without m initial velocity (degree 1) due to the deposit in the body of the m end of the deposit A, such as the picture transmission 1 - with 1 as shown. Addition: the shortest duration of power and motivation; (2) the time elapsed from object A to object B; (3) the length of scratches left on the conveyor; (4)