Physics
posted by sarah .
A cannon is fired from a cliff 190 m high downward at an angle of 21° with respect to the horizontal. If the muzzle velocity is 34 m/s, what is its speed (in m/s) when it hits the ground?

The kinetic energy will increase by
M g H.
Vfinal^2/2  Vo^2/2 = g H
(M cancelled out)
Solve for Vfinal