【摘 要】
：
题目质量为1千克的物体静止在光滑的水平面上,有水平外力F=1牛顿作用其上,且每隔5秒,F突然沿逆时针方向偏转90°角,20秒后撤除外力,那么最终结果是: (A)物体回到出发点(B)物
【机 构】
：
黑龙江省齐齐哈尔市第一中学 061005
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题目质量为1千克的物体静止在光滑的水平面上,有水平外力F=1牛顿作用其上,且每隔5秒,F突然沿逆时针方向偏转90°角,20秒后撤除外力,那么最终结果是: (A)物体回到出发点(B)物体的位移是502~(1/2)米(C)物体回到静止状态(D)物体的速度最大
The object with a mass of 1 kilogram stands still on a smooth horizontal surface. There is a horizontal force F=1 Newton acting on it, and every 5 seconds, F suddenly deflects 90° counterclockwise, and after 20 seconds, the excess force is withdrawn. The result is: (A) The object returns to the starting point (B) The displacement of the object is 502~(1/2) meters (C) The object returns to the stationary state (D) The velocity of the object is maximum
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