[問題] 物理問題
求救個,為什麼摩擦力方向不是往左而是往右,我看了詳解看不懂嗚嗚嗚嗚
祝大家考試順利
http://i.imgur.com/68BR2gb.jpg
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08/15 22:39, , 1F
08/15 22:39, 1F
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08/15 22:40, , 2F
08/15 22:40, 2F
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08/15 22:44, , 3F
08/15 22:44, 3F
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08/15 22:44, , 4F
08/15 22:44, 4F
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08/15 22:45, , 5F
08/15 22:45, 5F
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08/15 22:45, , 6F
08/15 22:45, 6F
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08/15 22:45, , 7F
08/15 22:45, 7F
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08/15 22:47, , 8F
08/15 22:47, 8F
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08/15 22:48, , 9F
08/15 22:48, 9F
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08/15 22:49, , 10F
08/15 22:49, 10F
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08/15 22:50, , 11F
08/15 22:50, 11F
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08/15 22:50, , 12F
08/15 22:50, 12F
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08/15 22:51, , 13F
08/15 22:51, 13F
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08/15 22:58, , 14F
08/15 22:58, 14F
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08/15 23:53, , 15F
08/15 23:53, 15F
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08/16 09:12, , 16F
08/16 09:12, 16F
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08/16 11:28, , 17F
08/16 11:28, 17F
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08/16 17:19, , 18F
08/16 17:19, 18F
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08/16 17:19, , 19F
08/16 17:19, 19F
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08/16 17:20, , 20F
08/16 17:20, 20F
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08/20 10:39, , 21F
08/20 10:39, 21F
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