Thurst Force

Описание: When the pipe connected to the motor “dances” or shakes as water comes out, it happens due to a combination of Newton’s Third Law of Motion and fluid dynamics:

🔹 1. Reaction Force (Newton’s Third Law)

When water is pushed out of the pipe at high speed, the water exerts an equal and opposite reaction force on the inside of the pipe.
This backward force tries to push or twist the pipe in the opposite direction.
If the pipe isn’t held firmly or is flexible (like a rubber pipe), it starts to vibrate or move (“dance”).

🔹 2. Pressure and Flow Fluctuations
When the motor first starts:
The pressure builds up quickly inside the pipe.
As water starts flowing, the pressure fluctuates because of turbulence and air bubbles.
These pressure surges make the pipe jerk and twist in irregular patterns.

🔹 3. Water Momentum and Hose Flexibility
Water flowing through a flexible pipe has momentum.
If the pipe bends, the water’s momentum direction changes — producing sideways forces.
These sideways forces continuously change as water moves, causing oscillations (shaking).
The effect looks like the pipe is “alive” or “dancing.”

🧠 Example Analogy:
It’s similar to how a fire hose wiggles wildly if the firefighter doesn’t hold it tightly — because the fast water jet pushes back on the hose.