A.乙单独向甲走动 |
B.甲乙相向走动,乙的速度大于甲 |
C.甲乙相向走动,乙的质量大于甲 |
D.甲乙相向走动,乙的动量大于甲 |
m乙v乙 |
m船 |
-m甲v甲-m乙v乙 |
m船 |
-m甲v甲-m乙v乙 |
m船 |
A.0 | B.2m/s | C.4m/s | D.无法确定 |
A.0.6υ | B.0.4υ | C.0.2υ | D.0.1υ |
A.12kgm/s,l2kgm/s | B.一9kgm/s,35kgm/s |
C.8kgm/s,16kgm/s | D.7kgm/s,15kgm/s |
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