[題目] 功與能

[zayin (看不清)]

[題目]                             o
      A 4.0kg bundle starts up a 30 incline with 128J of kinetic energy.
How far will it slide up the incline if the coefficient of kinetic friction
between the bundle and the incline is 0.3?

[瓶頸]

想說從一開始物體的動能128J轉換成位能,但是期間有動摩擦力的作用,

不知道要如何處理?

謝謝

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→ Ertkkpoo:128J-->potential energy + work done by friction force