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高一物理题如图,若两物体的重力分别为GA=20N,GB=40N,A,B间的动摩擦因数μ1=0.2,B与地面间动摩擦因数μ

高一物理题
如图,若两物体的重力分别为GA=20N,GB=40N,A,B间的动摩擦因数
μ1=0.2,B与地面间动摩擦因数μ2=0.4,用力F作用在B上后,A,B间都发生了相对滑动,求各接触面间的摩擦力的大小
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f(B-地)=0.4*40=16(N)
f(A-B)=0.2* 20=4(N)

1年前

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