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如图(上右)所示,质量为4kg的物体静止于水平面上,物体与水平面间的动摩擦因数为

题型:计算题

题目:

如图(上右)所示,质量为4kg的物体静止于水平面上,物体与水平面间的动摩擦因数为0.5,物体受到大小为20N,与水平方向成37°角的斜向上的拉力作用时沿水平面做匀加速运动.求3s内物体的位移是多大?(g=10m/s2,sin370=0.6,cos370=0.8)

答案:

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