1. The problem statement, all variables and given/known data The range of a cannonball fired horizontally from a cliff is equal to the height of the cliff. What is the direction of the velocity vector of the projectile as it strikes the ground? (ignore air resistance) 2. Relevant equations I attempted setting delta y = delta x, but had not luck. 3. The attempt at a solution The apparent solution is 63.4 degrees below the horizon.