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  1. ================================= 圖片參考:https://s.yimg.com/rk/HA05107138/o/2072600647.png

    分類:科學及數學 > 數學 2014年12月08日

  2. Here is an example of the cooling system for CPU used in desktop computers 圖片參考:http://i256.photobucket.com/albums/hh182/zilu_photo/65.jpg http://i256.photobucket.com/albums/hh182/zilu_photo/65.jpg in all industry, the processing unit for all...

  3. ...fraction of their overall area. And this area is in proportion to the normal force ( surface pressure x total contact area). So, Coulomb friction depends only...

  4. for this kind of question, we should divide the weight into 2 componenets one is paralle to the inclined road (mg sin10)and the another one is prependicular to the inclined road (mg cos10) for the friciton, as it is acting in the direction that is parallel to the...

  5. ... height of B) = √4 : √1 = 2 : 1 (2) true (Curved surface area of A) : (Curved surface area of B) = 2² : 1²...

    分類:科學及數學 > 數學 2015年01月04日

  6. " Normal incidence" means the incident ray is perpendicular to the incident surface . In other words, the angle of incidence is zero degree.

  7. ...magnitude and direction of the "weight" (mg) that we experienced on earth surface . The " normal reaction (N)" is just in opposite direction to the "experienced...

    分類:科學及數學 > 物理學 2016年12月27日

  8. 其實呢句主要係想否定d人對 normal reaction的誤解.. 可以改變 normal reaction的因素大概只有g的改變同mass的改變.. 而唔係depends on個touching surface 既area.. 至於同friction既關係.. 一同物體在無external force既情況之下.. 要產生friction...

  9. ... surfaces is influenced by the coefficient of friction between the surfaces in contact, the normal reaction force, the radius of curvature of the rolling object, and its deformability...

  10. ...the weight of the object, becomes 1/4 of that on earth surface . The answer is therefore option (1), 25N...5. Let F be the normal reaction acting on the man, mg be the weight of the man...