Explain why a fluid flowing out of a small hole in a vessel results in a backward thrust on the vessel.

Explanation

To explain why a fluid flowing out of a small hole in a vessel results in a backward thrust on the vessel, we can follow these steps:

### Step 1: Understanding the Equation of Continuity
The equation of continuity states that for an incompressible fluid flowing through a pipe, the product of the cross-sectional area (A) and the fluid velocity (v) at any two points along the flow must be constant. Mathematically, this can be expressed as:
\[ A_1 v_1 = A_2 v_2 \]
where \( A_1 \) and \( v_1 \) are the area and velocity at one point, and \( A_2 \) and \( v_2 \) are the area and velocity at another point.

### Step 2: Analyzing the Small Hole
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