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如右圖m1=40kg,r1=6cm,m2=30kg,r2=4cm,圓桶的內徑為18cm,求各接觸點間的作用力為若干?
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Posted in 合力=0.
Tagged with 合力=0, 正向力, 靜力平衡.
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By admin – 2010 年 09 月 14 日
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