A ball is thrown horizontally off a building that is 30 m high with an initial velocity of 3 m/s.if an identical ball is thrown again horizontally from the same height with 6 m/s, what happens to the flight time?

I have to use the guess method.
Givens
Unknown
Equation
Substitute
Solve

2 answers

You need to review Galileo and his tower drop. All objects fall a the same rate. If the he had shot one out of a horizontal gun at 400m/s, it would fall at the same rate as a at still tennis ball.
can you help me answer the question, though..? i've been stuck on this for days. i just don't understand it