標題:

驚世physics free-body diagram難題

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http://i237.photobucket.com/albums/ff254/DW721/742a5e21.jpg 如圖入面 有本書靠住牆 要畫free-body diagram 要有埋friction 本書又唔跌落嚟 (resultant force係0) thx=] 更新: to Audrey Hepbum 本書apply落幅牆個force呢? 更新 2: to Audrey Hepbum 咁最後d force係咪咁? http://i237.photobucket.com/albums/ff254/DW721/232.jpg

最佳解答:

The free-body-diagram is as follows: 圖片參考：http://i182.photobucket.com/albums/x4/A_Hepburn_1990/A_Hepburn01Jan041225.jpg?t=1231043161 where mg: weight of the book R1: Reaction exerted on the book by the vertical wall f1: Frictional force exerted on the book by the vertical wall R2: Reaction exerted on the book by the ground f2: Frictional force exerted on the book by the ground 2009-01-04 13:40:04 補充： 哦，因為你的問題無講清楚是free-body diagram of the book，還是free-body diagram of the system. 所以我只畫了free-body diagram of the book 如你要reaction on the wall by the book，只是與R1相反方向便行了。 2009-01-04 15:28:31 補充： 不對，你沒有frictional force on the wall by the book, 和frictional force on the ground by the book. 而且，你沒有weight of the book 其餘的你也對。

其他解答:FAD2A23AB937987B
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