作者ggyy940 (~别骂我ID~)
看板Physics
标题[题目] 普物一题
时间Thu Nov 26 14:34:53 2009
[领域]
Center of mass and momentum
[来源]
原文书
[题目]
1.
A 1400kg car moving at 5.3m/s is initially traveling north along the positive
diretion of a y axis.After completing a 90度 right-hand turn in 4.6s,
the inattentive operator drives into a tree,which stops the car in 350ms.
In unit-vector notation,what is the impulse on the car(a)due to the turn and
(b)due to the collision? What is the magnitude of the averge force that acts
on the car (c)during the turn and(d)during the collision?(e)What is the
direction of the average force during the turn?
[瓶颈]
题目看不太懂它是要求什麽
麻烦物理高手帮忙一下
感谢!!~
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1F：→ MOONRAKER:(a)转弯的冲量(b)撞树的冲量(c)转弯中平均力 11/26 14:57
2F：→ MOONRAKER:(d)撞树中平均力(e)转弯中平均力方向。须用单位向量表示 11/26 14:58