A tank 2.8 m high standing on the ground is kept full of.water. There is an orifice in itsvertical side at a depth hm below the surface of water, Find the vallue of h in order that thejet may strike the ground at a maximum distance from the tank
Question
A tank 2.8 m high standing on the ground is kept full of.water. There is an orifice in itsvertical side at a depth hm below the surface of water, Find the vallue of h in order that thejet may strike the ground at a maximum distance from the tank
Solution
The problem is about fluid dynamics and the trajectory of a jet of water. The maximum horizontal distance (range) a jet of water can reach is when it is projected at an angle of 45 degrees.
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First, we need to find the velocity of the water as it leaves the orifice. This can be found using Torricelli's theorem, which states that the speed v of efflux of a fluid under the force of gravity from a hole in a large, open container is given by v = sqrt(2gh), where g is the acceleration due to gravity and h is the height of the fluid above the hole.
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Next, we need to find the angle at which the water leaves the tank. This is given by the equation tan(theta) = h / (h - h'), where h' is the height of the hole above the ground.
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We set this angle to 45 degrees for maximum range, so tan(45) = 1 = h / (h - h'). Solving for h' gives h' = h / 2.
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Therefore, the hole should be placed at a height h' = h / 2 = 2.8m / 2 = 1.4m above the ground for the jet to strike the ground at a maximum distance from the tank.
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