Question

Allen

大一普物 求大神證明第7題動摩擦係數=3/5tanθ

7

吉克              點

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the two books lie?

 

 

 

語人人

Find an expresSion the minimum frictional coeffcient needed to keep a car with speed y on a banked
turn 0f Adesil           for Speed
只也      科起 蟬

Ablock is 語和1 an incline at angle   名 Itreturns to its initial position With half 生initial Speed. Show

that the coefficient of kinetic friction 8 //, =    # tan.                                                 全 2 謂

Youpull abox 23 m horizontally, using the rope shown in Fig.3. Ifthe rope tension is 120 N, and 註the rope

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Answer 1

棠糖✏

從力學能守恆下去算，可以求出圖片的式子，未知數只有s跟μ，兩個式子兩個未知數，就能算出μ=3/5tanθ了。
by 高中物奧仔

Allen

感謝~