2u2?u12 H?h0?H2?H1?
2g由题意：h0?0.4m H2?3.8kg/cm2?3.8?10?38m H1??200mmH?g?0.2?13.6??2.72m
u1?
V?4?3600?1213d2?4?0.92m/s
?0.0682?2.53m/su2?3600?将上述数据代入
?4?0.04122.532?0.922H?0.4?3.8?(?2.72)??41.4m2?9.81QH? ?N?
102?QH?12?41.4?1000?????58.82N3600?102?2.3
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