The lock gate of a canal (Fig. 2.5) is rectangular, 20 m wide and 10 m high. One side is exposed to the atmosphere, the other side to water whose top surface is level with the top of the lock gate. What is the net force on the lock gate? Pressure of atmosphere on water

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Example 2.8.
The lock gate of a canal (Fig. 2.5) is rectangular, 20 m wide and 10 m high. One side is
exposed to the atmosphere, the other side to water whose top surface is level with the top of
the lock gate. What is the net force on the lock gate?
Pressure of atmosphere on water
Water
Pressure of fluid
on front of gate
Lock gate
Pressure of
atmosphere
on back of gate
Z
Figure 2.5 Horizontal pressure forces on a vertical surface
Transcribed Image Text:Example 2.8. The lock gate of a canal (Fig. 2.5) is rectangular, 20 m wide and 10 m high. One side is exposed to the atmosphere, the other side to water whose top surface is level with the top of the lock gate. What is the net force on the lock gate? Pressure of atmosphere on water Water Pressure of fluid on front of gate Lock gate Pressure of atmosphere on back of gate Z Figure 2.5 Horizontal pressure forces on a vertical surface
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