P |
vm |
BLvm | ||
r+
|
BLv | ||
r+
|
B2L2v | ||
r+
|
P |
v |
P |
at |
B2L2at | ||
r+
|
20 |
3 |
20 |
3 |
B2L2v | ||
r+
|
4t |
3 |
7 |
3 |
1 |
2 |
I |
2 |
I |
2 |
20 |
3 |
1 |
2 |
1 |
2 |
20 |
3 |
1 |
2 |
5 |
6 |
20 |
3 |
1 |
2 |
10 |
3 |
1 |
2 |
1 |
2 |
5 |
6 |
10 |
3 |
20 |
3 |
4t |
3 |
7 |
3 |
1 |
4 |
A.物体运动的加速度不会大于6m/s2 |
B.物体运动的加速度不会小于6m/s2 |
C.物体运动到B时的速度为6m/s |
D.物体从A运动到B用的时间为1.5s |
A.15N | B.100N | C.200N | D.50N |
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