you and your friend are riding on a helicopter that is traveling west at a speed of 10 meters per second. You throw a baseball with a velocity of 2 meters per second north, straight across the inside of the helicopter to your friend on the other side. What is the velocity of the baseball relative to the ground?
V^2 = X^2 + Y^2 = 2^2 + 10^2 = 104
V = 10.20 m/s.