A 10.0kg water balloon is dropped from a height of 12.0m. Calculate the speed of the balloon just before it hits the ground

15.5 m/s.

Explanation:

Potential energy of the balloon has been converted to kinetic energy.

potential energy = kinetic energy.

mgh = ½mv².

10 * 10 * 12 = ½ * 10 * v²

1200 = 5v²

v²=1200:5

v=√240

v = 15.49~15.5 m/s.