[領域] 轉動 [來源] 原文書 [題目] 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 [瓶頸] 第一題不是要問他的轉動慣量嗎 可是題目不是已經給了0.06? 還是他要求什麼??(題目有點看不懂..) 第二題可以直接用1/2mv^2=1/2Iω^2嗎? 感謝高手幫忙一下 謝謝 --

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