Describe how the vertical component of the velocity of the water varies form point X to point Z?
Image with a flat horizontal line with a curve on top (beg curve: X, top middle curve: Y, End bottom curve: Z)
Mark scheme Answer:
decreases from x to y
DON’T GET I thought it INCREASES
zero at y,x,z
I UNDERSTAND
increases from y to z
DON’T GET I THOUGHT IT DECREASES
positive from x to y and negative from y to z(or vice versa)
DON’T GET HOW IT COULD BE VICE VERSA
Please help and clearly explain the things I don’t understand and why.
Explain why it decreases from x to Y and increases from y to z
Here I've already written what I thought of the question in caps lock and the thing I dont know at the bottom.
I do not have your picture.
Y
- -
- -
- -
- -
- -
X Z
Y
-- -
-- --- -
- ----- -- -
-------------- -
- ----------------- -
X Z
...........---y----
.........-----------
......-------------------
...--------------------------
. x----------------------------z
It looks kinda like the last image i posted but its a curve
and equal on both side
...........---y----
.........-----------
......-------------------
...--------------------------
. x----------------------------z
is the picture
To understand why the vertical component of the velocity of the water decreases from point X to Y and then increases from point Y to Z, we can analyze the shape of the curve.
From the given information, we can identify three key points: X, Y, and Z. Let's break it down step by step:
1. Decrease from X to Y:
As we move from point X to Y, the curve on top is going downward. This indicates that the water's vertical velocity is decreasing in magnitude. In other words, the water is slowing down as it moves from X to Y.
2. Zero at Y, X, and Z:
The marking scheme answer mentions that the vertical component of the velocity is zero at points Y, X, and Z. Zero velocity means that the water is momentarily not moving in the vertical direction at these points. Point Y is at the top of the curve, where the water momentarily reaches its maximum height before descending. Points X and Z are at the ends of the curved line where it joins the flat horizontal line.
3. Increase from Y to Z:
After point Y, as we move towards point Z, the curve starts to rise again. This indicates that the water's vertical velocity is increasing in magnitude. In other words, the water is accelerating as it moves from Y to Z.
Overall, the vertical component of the water's velocity decreases from point X to Y because it is slowing down, reaches zero at Y, X, and Z, and then increases from Y to Z because it is accelerating.