What is the KE of ball as it hits the water, and what is it's final velocity as it hits the water A cannon fires a 1kg cannonball with a velocity of 100m/s at 60 degrees to the horizontal and from a cliff which is 20m above sea leve. By taking the changes in PE and KE?
A. 50 m/s B. 86.6 m/s C. 100.0 m/s D. 101.9 m/s E. 107.7 m/s