What do you mean by resultant vector ?

Explanation

### Step-by-Step Solution

1. **Definition of Resultant Vector**: A resultant vector is defined as the vector sum of two or more vectors. It represents a single vector that has the same effect as the combined effect of the individual vectors.

2. **Example with Forces**: Consider a scenario where three forces are acting on a body:
- Force \( F_1 \) acting in one direction,
- Force \( F_2 \) acting in another direction,
- Force \( F_3 \) acting in a third direction.
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