The momentum of the water balloon is equal to: C) 7.2 kgm/s
Given the following data:
To determine the momentum of the water balloon:
In Physics, momentum refers to the multiplication of the mass of an object and its velocity. Thus, momentum is a vector quantity because it has both magnitude and direction.
Mathematically, momentum is given by the formula;
[tex]Momentum = mass \times velocity[/tex]
Substituting the given parameters into the formula, we have;
[tex]Momentum = 0.4 \times 18[/tex]
Momentum = 7.2 kgm/s
Read more on momentum here: https://brainly.com/question/23092552