The correct option for calculating momentum using the formula \( P = mv \) is:
45 kg*m/s = (9 kg) (5 m/s)
This is because:
- Here, \( m = 9 , \text{kg} \) and \( v = 5 , \text{m/s} \).
- Therefore, \( P = 9 , \text{kg} \times 5 , \text{m/s} = 45 , \text{kg*m/s} \).
The other options are incorrect, either in units or calculations.