问题
选择题
如图所示，甲、乙、丙三个质量相同，与地面动摩因数相同，受到三个大小相同的作用力F，它们受到摩擦力大小的关系是
A．三者相同
B．乙最大
C．丙最大
D．已知条件不够，无法判断谁最大
答案
答案：D
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如图所示，甲、乙、丙三个质量相同，与地面动摩因数相同，受到三个大小相同的作用力F，它们受到摩擦力大小的关系是
A．三者相同
B．乙最大
C．丙最大
D．已知条件不够，无法判断谁最大
答案：D
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