The momentum \( p \) of an object is calculated using the formula:
\[ p = m \cdot v \]
where \( m \) is the mass of the object and \( v \) is its velocity.
Given:
- Mass \( m = 2 , \text{kg} \)
- Velocity \( v = 3 , \text{m/s} \)
Now, substituting the values into the formula:
\[ p = 2 , \text{kg} \times 3 , \text{m/s} = 6 , \text{kg} \cdot \text{m/s} \]
Therefore, the magnitude of the momentum is 6.0 kg·m/s.
So the correct response is 6.0.