5. (8%) A processor and two options for improving its hardware and compiler design are described as
follows:
3. 如圖所示,在水平光滑桌面有一圓環半徑為 R,質量為 4m,環心兩側
分別有體積不計的重物 3m、2m,假設圓環及重物原先皆靜止於桌面,
今環心發生爆炸,使二重物向左右二側分離且 3m 的速度為 V(相對於
桌面),重物碰圓環後即黏上圓環不脫落,假設過程中不涉及轉動,
求當兩重物皆黏上圓環後,
(2)爆炸到停止共花多少時間?
(A)
(B)
(C)