Two projectiles, K and Z, are launched from the top of a building with the same initial speed. Their launch angles (relative to the horizontal ground) are θ_K = 45° and θ_Z = -45°. Which projectile will hit the ground with greater speed (neglecting air resistance)?
a) K
b) Z
c) Both will have the same speed
d) K will never hit the ground
e) There is not enough information to tell