Question related to flow and Bernoulli\'s equation for phet simulated lab: \"Now

Question

Question related to flow and Bernoulli's equation for phet simulated lab:

"Now use the brown knob at the opening of the hose to adjust the angle at which water comes out. When water comes out at an angle (instead of going straight up), water does not shoot as high as before. Explain your observations qualitatively"

For context water is flowing continually into a water tank and then through into a hose which is pointed at an angle. The height of the water is therefore less for the hose at an angle than if it is vertical. I just need some help explaining this in words related to bernoulli's concepts etc.

Explanation / Answer

When there is no angle to the hose then the velocity of water is only in the vertical direction i.e the water is flowing in only one direction. Now, when we give an angle to the hose, the height changes. As, by bernoullis Theorem and equation of continuity, the velocity of the water coming out of the hose will be the same but now there will be two components of the velocity, 1) Horizontal component 2) Vertical Component.
So, the net velocity in the vertical direction is less as compared to the initial case, hence the height of the water is less.

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