A.200W | B.500W | C.1000W | D.2000W |
W |
t |
Fx |
t |
1000×20 |
20 |
A.mg
| B.mgcosθ
| ||||||
C.mgsinθ
| D.mgsinθ
|
A.5kw | B.10kw | C.20kw | D.40kw |
A.V=2m/s,t=2.0s | B.V=2m/s,t=1.0s |
C.V=2m/s,t=1.1s | D.V=3m/s,t=1.5s |
A.0.1m/s | B.2.5m/s | C.0.4m/s | D.1m/s |
A.W | B.
| C.
| D.2W |
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