The momentum of the water balloon at the given speed is 7.2 kgm/s.
The given parameters:
- Speed of the water balloon, v = 18 m/s
- Mass of the balloon, m = 0.4 kg
The momentum of the water balloon is calculated as follows;
P = mv
Substitute the given values of mass and velocity as follows;
P = 0.4 x 18
P = 7.2 kg m/s.
Thus, the momentum of the water balloon at the given speed is 7.2 kgm/s.
Learn more about momentum here: https://brainly.com/question/7538238
