μ1mg |
m |
v0 |
μ1g |
(F-μ1mg) |
2m |
(F-μ1mg) |
2m |
v0 |
μ1g |
1 |
2 |
1 |
2 |
L |
2 |
| ||
gL |
5m
| ||
L |
5 |
3 |
L |
2 |
1 |
2 |
1 |
2 |
1 |
2 |
5 |
3 |
2
| ||
3gL |
μ1 |
μ2 |
3 |
2 |
5m
| ||
L |
A.物体的加速度是3.6m/s2 |
B.物体的加速度是4m/s2 |
C.物体在第4s内的位移是16m |
D.物体在第4s内的位移是14m |
A.12 m | B.9 m | C.18m | D.14m |
A.l:8 | B.l:6 | C.l:5 | D.1:3 |
A.2m/s,3m/s,4m/s | B.2m/s,4m/s,6m/s |
C.3m/s,4m/s,5m/s | D.3m/s,5m/s,7m/s |
A.ls内阻力对汽车所做的功 |
B.刹车时汽车受到的阻力 |
C.开始刹车时汽车的动能 |
D.刹车时汽车的加速度 |
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