按照题目要求作图，如图，举着哑铃的前臂骨骼可看成杠杆，画出动力F1的示意图及阻力F2的力臂L2．_刷题宝

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按照题目要求作图，如图，举着哑铃的前臂骨骼可看成杠杆，画出动力F₁的示意图及阻力F₂的力臂L₂．

上一题下一题 0.0难度选择题更新时间:2018-10-23 09:08:43

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解：如下图所示：

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