A.36m | B.60m | C.120m | D.360m |
1 |
2 |
t | 21 |
1 |
2 |
t | 22 |
x1 |
x2 |
| ||
|
1 |
36 |
A.物体在t0和2t0时刻相对于出发点的位移之比是1:5 |
B.物体在t0和2t0时刻的瞬时速度之比是1:5 |
C.外力在0到t0和t0到2t0时间内做功之比是1:8 |
D.外力在t0和2t0时刻的瞬时功率之比是1:8 |
A.4.8s | B.4s | C.8.8s | D.10s |
A.4m | B.36m |
C.6.25m | D.以上答案都不对 |
A.4m/s和2m/s2 | B.4m/s和-4m/s2 |
C.4m/s和4m/s2 | D.4m/s和0 |
A.1m/s | B.2m/s | C.3m/s | D.4m/s |
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