A stationary enemy ship is docked in the sea at a distance of 1.0 km from the coastline. A gun located at the sea level on the coastline can fire projectiles at avelocity of 120m/s. What is the angle (in degrees) above the horizontal at which the gun must fire to hit the ship? [ g=9.8 m/s2 ]
1
21.4
2
42.9
3
23.6
4
47.1