What is the vertical component of the velocity when the cannon ball 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 level.

Use time independent suvat equation: to find v,
u= 86.6
a = 9.81
s=20
Take downwards as positive since final velocity is downwards and so values are added.