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今年高考题的最后一道题:一平板车,质量 M=100千克,停在水平路面上,车身的平板离地面的高度h=1.25米,一质量 m=50千克的小物块置于车的平板上,它到车尾端的距离 b=1.00米,与车板间的滑动摩擦系数μ=0.20,见本期第5页图19。今对平板车施一水平方向的恒力,使车向前行驶,结果物块从车板上滑落。物块刚离开车板的时刻,车向前行驶的距离 s_0=
The final question of this year’s college entrance examination question is: A flatbed vehicle with mass M=100 kg, parked on a horizontal road, the height of the body slab from the ground is h=1.25 meters, and a mass of m=50 kg is placed on the car’s flat panel. Its distance from the rear end of the car is b = 1.00 m, and the coefficient of sliding friction with the car plate is μ = 0.20. See Figure 19 on page 5 of this issue. A horizontal direction constant force is applied to the flatbed car so that the car moves forward, and the resulting piece slides off the floor. When the object just left the car, the distance the car is moving forward s_0=