一道英文物理题A 4kg body is placed on horizontal ground.The coefficient _英语解答

一道英文物理题
A 4kg body is placed on horizontal ground.The coefficient of dynamic friction between the body and the ground is 0,2.The object is acted upon by a force of 30 N that encloses an angles of 20 whith horizontal.Find the friction force and the acceleration of the body.

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解答

翻译:一个4kg的物体放置在水平面上.物体和地面之间的摩擦因数是0.2.物体受一个与水平面夹角是20度的力的作用,力大小是30N.求摩擦力和物体的加速度.竖直方向上物体没有加速度,受力平衡:Fsin20度+N=mg 其中,F是拉力,N...