9 - 校園網頁伺服器

9 - 校園網頁伺服器

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日期:2024-09-15
What is friction? Friction (摩擦力) is a contact force (接觸力). It exists whenever two surfaces are in contact. If the surfaces are rough, the friction will be greater. Friction always opposes the motion of the body. If there is no other external forces that ....看更多