做功的两个必要因素是：_1、_2．功的符号是：_3，功的单位是：_4，功的单位符号是：_5．它的计算公式为_6．_刷题宝

题干

做功的两个必要因素是：____、____．功的符号是：____，功的单位是：____，功的单位符号是：____．它的计算公式为____．

上一题下一题 0.0难度选择题更新时间:2019-02-23 05:08:47

答案(点此获取答案解析）

作用在物体上的力,力的方向上通过的距离,W,焦,J,Fs

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