2.5.11. A sliding gate 10 ft wide and 6 ft high is installed in a vertical plane and has a coefficient of friction against the guides of 0.2. If the gate weighs 6,040 lb and its upper edge is 17 ft below the water surface, calculate the vertical force required to lift the gate.

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Chapter2: Loads On Structures
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I need help with question 2.5.11 in my txt book, answer is 21000 Ib lifting force. I just dont know how to obtain this answer. Your help will be much appreciated. Will rate, thank you.

2.5.11. A sliding gate 10 ft wide and 6 ft high is installed in a vertical plane and
has a coefficient of friction against the guides of 0.2. If the gate weighs 6,040 lb
and its upper edge is 17 ft below the water surface, calculate the vertical force
required to lift the gate.
Transcribed Image Text:2.5.11. A sliding gate 10 ft wide and 6 ft high is installed in a vertical plane and has a coefficient of friction against the guides of 0.2. If the gate weighs 6,040 lb and its upper edge is 17 ft below the water surface, calculate the vertical force required to lift the gate.
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