Physics
Senior High
(3)で、答えに動摩擦力の向きと物体の運動の向きのなす角は180°とあるのですがなぜそのようになるのか教えてください
よって テー5.0J b
(3) 動摩擦の向きと物体の運動の向きのなす角ss
で. 仕事の式「ーrxcos91ょより
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