The magnitude of momentum \( p \) is calculated using the formula:
\[ p = m \times v \]
where:
- \( m \) is the mass of the body (in kilograms),
- \( v \) is the velocity of the body (in meters per second).
Given:
- \( m = 2 , \text{kg} \)
- \( v = 3 , \text{m/s} \)
Substituting the values into the formula:
\[ p = 2 , \text{kg} \times 3 , \text{m/s} = 6 , \text{kg m/s} \]
Therefore, the magnitude of the momentum is 6.0.