作者zayin (看不清)
看板Physics
标题[题目] 功与能
时间Tue Jul 3 23:41:58 2012
[题目] 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?
[瓶颈]
想说从一开始物体的动能128J转换成位能,但是期间有动摩擦力的作用,
不知道要如何处理?
谢谢
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◆ From: 118.232.20.199
1F：→ Ertkkpoo:128J-->potential energy + work done by friction force 07/03 23:43