[领域] 转动 [来源] 原文书 [题目] A 1g bullet is fired into a 0.5kg block attached to the end of a 0.6m nonuniform rod of mass 0.5kg. The block-rod-bullet system then rotates in the plane of the figure, about a fixed axis at A is 0.06kg m^2 . Treat the block as particle. (a) What then is the rotational inertia of the block-rod-bullet system about point A? (b) If the angular speed of the system about A just after impact is 4.5 rad/s, what is the bullet's speed just before impact? A │ │rod │ │ │ ▉-------> ██ bullet block [瓶颈] 第一题不是要问他的转动惯量吗 可是题目不是已经给了0.06? 还是他要求什麽??(题目有点看不懂..) 第二题可以直接用1/2mv^2=1/2Iω^2吗? 感谢高手帮忙一下 谢谢 --

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