A.a1>a2,t1<t2 | B.a1>a2,t1>t2 |
C.a1<a2,t1<t2 | D.a1<a2,t1>t2 |
v0 |
2 |
v |
2 |
A.路程为85m |
B.位移大小为75m |
C.速度的改变量大小为30m/s |
D.平均速度的大小为17m/s |
A.8m/s2,20m/s | B.10m/s2,25m/s |
C.8m/s2,25m/s | D.10m/s2,20m/s |
A.
| B.(2-
| C.(2+
| D.(2-
|
A.1s | B.2s | C.3s | D.4s |
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