A vertical dam has the form of an isosceles trapezoid with horizontal sides parallel. The dam is 20 m high, 20 m in its lower part and 40 m in its upper part. Finally, the dam retains 15 m of water, as indicated in the figure below. -20 20 15 0

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A vertical dam has the form of an isosceles trapezoid with horizontal sides parallel. The dam is 20 m high, 20 m in its lower part and 40 m in its upper part.
Finally, the dam retains 15 m of water, as indicated in the figure below.
20
-
20
15
a) Let y denote the height in meters measured from the base of the dam. The hydrostatic force exerted by the water on the portion of the dam comprised
between y m and y + Ay m is approximately p (y) Ay N. What is p (y)? Note that the density of water is p = 1000 Kg/m³ and the acceleration due
to gravity on the earth's surface is g = 9.8 m/s2 Express your answer as a formula
Answer:
b) in Newtons, what is the total hydrostatic force exerted on the dam?
FORMATTING: If you round your answer, ensure that the round-off error is less than 1% of the value.
Answer Number
Transcribed Image Text:A vertical dam has the form of an isosceles trapezoid with horizontal sides parallel. The dam is 20 m high, 20 m in its lower part and 40 m in its upper part. Finally, the dam retains 15 m of water, as indicated in the figure below. 20 - 20 15 a) Let y denote the height in meters measured from the base of the dam. The hydrostatic force exerted by the water on the portion of the dam comprised between y m and y + Ay m is approximately p (y) Ay N. What is p (y)? Note that the density of water is p = 1000 Kg/m³ and the acceleration due to gravity on the earth's surface is g = 9.8 m/s2 Express your answer as a formula Answer: b) in Newtons, what is the total hydrostatic force exerted on the dam? FORMATTING: If you round your answer, ensure that the round-off error is less than 1% of the value. Answer Number
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