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> 物体放在水平面上，当它受水平的力F作用，由静止开始前进的距离为S时，则（　　） A．当有摩擦时，F对物体做功多 B．当无摩擦时，F对物体做功多 C．上述两种情况，F对物体做功一样多 D．上述两种情况，物体获得的动能增量一样

问题：

发布时间：2024-09-09

物体放在水平面上，当它受水平的力F作用，由静止开始前进的距离为S时，则（　　）

A．当有摩擦时，F对物体做功多

B．当无摩擦时，F对物体做功多

C．上述两种情况，F对物体做功一样多

D．上述两种情况，物体获得的动能增量一样

参考答案：

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