Can someone help with this Physics Problem?

Question

In class we did a demonstration where two balls were launched at the same time. The balls had different velocities in the horizontal direction yet hit the floor at the same time. Explain this result. (In other words, why didn't the ball with the greater horizontal velocity hit later?)

Answer 1

The force of gravity is the same on the two balls therefore they will hit the floor at the same time. They accelerate towards the floor at 9.81 meters/sec/sec. If they start out at the same height, they'll experience the same acceleration and will land at the same time. One may travel further in the horizontal direction, but that is due to its initial horizontal velocity.

Answer 2

Wow!
" two balls were launched at the same time. The balls had different velocities in the horizontal direction yet hit the floor at the same time."

That sounds really painful!

P.S. -- Sorry guys, I think I've had too much to drink.

Answer 3

Why should that happen so? Both balls are subject to the same VERTICAL acceleration, and speed. As long as both balls are launched from the same height, they will hit ground at the same time. In fact, you may focus only in vertical displacement, and disregard entirely horizontal displacement -and speed.

In this case, both balls are dropped -zero initial vertical speed- from the same height. Why should one ball land before the other?

Answer 4

Because gravity acceleration is the same for both, never mind how far horizontally they travel.

Answer 5

Gravity only works in one direction. The other direction can be ignored.

Answer 6

If their speed were relativistic
then the same time is not correct