A boat in a lock with lock door A a water height of 4 . 2 m
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Question:
A boat in a lock with lock door A a water height of m Lock door B a height of m The
width of the locks is m Lock A to B where the boat is moored m long. The boat is
m wide, m long, and lies m deep in the water. How to do e
a Determine the force and power required for the boat to sail at a speed of kmh and a
drag coefficient of Also say what things you neglect or assume or something.
b What is the Reynolds number at this speed? You can use the length of the boat as the
unit of length.
c Is this a good number for a shipping vessel? Whywhy not? How can you further reduce
the hydrostatic resistance? Explain.
d If the lock gate in A is raised cm in the vertical direction. How long does it take before
the water level in the lock has dropped?
e If the boat drives backwards and collides with lock door B a hole of m in area is
created at a height of m The door in lock A is closed vertically again but remains stuck at
a height of cm After a very long time, what is the water level in the lock?
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