Question

If the cannonball in the previous question is fired horizontally at 100 m/s from a 400 m high cliff, but still 800 m from the building, then, the ball will do what?

A) hit the building in 2.0 s.
B) hit the building in 4.0 s.
C) hit the building in 8.0 s.
D) hit the ground before hitting the building.
E) hit the building in 10 s.