gt |
v0 |
| ||
v0t |
gt |
2v0 |
A.v0<v<2v0 | B.v=2v0 | C.2v0<v<3v0 | D.v>3v0 |
A.一定不会落在N点的左边 |
B.可能落在N点的右边 |
C.可能落在N点的左边 |
D.仍可能落在N点 |
A.vA=vB=vC | B.vA=vB<vC | C.PA<PB<PC | D.PA=PB=PC |
A.10
| B.20m/s | C.10
| D.30m/s |
A.仍在P点 |
B.P点左边 |
C.P点右边不远处 |
D.P点右边原水平位移两倍处 |
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