本题目来源于试卷: Centre of mass system，类别为 美国物理杯赛(Physics Bowl)
[单选题]
06.10: A firecracker expy 3 kr6wardq6tw .9h;0zti o3zlodes while in flight along a parabou daketp-q 8qy:35ux v)n(xk+lic path and fragments from it travtx quudyp8n3(a) e kv :-xq+k5eling all directions. After the explosion, the center of mass of the firecracker
A. falls directly vertically downward.
B. ceases to exist.
C. lands equidistance from all fragments
D. has no forces acting on it.
E. continues to move along a parabolic path.
参考答案: E
本题详细解析:
暂无
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