# Free fall and distance traveled question.

## Homework Statement

(Yes this is a question about Batman.)

To escape from Batman, 4 villains on motorcycles drive
horizontally oﬀ the edge of a parking garage, landing in a pile
of sand. The riders all have diﬀerent initial speeds: v0A =
14m/s, v0B = 24m/s, v0C = 18m/s, and v0D = 19m/s. Rank
these four riders in order of time of ﬂight, from shortest time to
longest, with no spaces, using < or = symbols between them.
For ties, list answers alphabetically. For example: D<A=C<B

## Homework Equations

Xf = Xi + Vix*dT + (1/2)a*dT^2

Vfx = Vix + a*dT

Vfx^2 = Vix^2 + 2a*dT

Xf = Xi + (1/2)(Vix + Vfx)*dT

## The Attempt at a Solution

My first thought was to take a stab at finding Xf, and then finding delta T, but after going through with this my answer ended up being wrong. This is the information I gathered from the problem... It seems that I made my list wrong as I listed the horizontal acceleration as g when it shouldn't be, so I'm left with this.
Xi = 0
Xf = ?
Vix = Vo
Vfx = ?
ax = 0
dT= ?

Yi = ?
Yf = 0
Viy = ?
Vix = ?
ay = -g

This question really has me stumped. There's no angle theta and initial height of the building to help me out, so I'm confused.

Related Introductory Physics Homework Help News on Phys.org
To escape from Batman, 4 villains on motorcycles drive
horizontally oﬀ the edge of a parking garage, landing in a pile
of sand.
------------
Since all took off horizontally, thus zero vertical velocity, and landed on the same level, time of all flights are all equal.
A=B=C=D.

To escape from Batman, 4 villains on motorcycles drive
horizontally oﬀ the edge of a parking garage, landing in a pile
of sand.
------------
Since all took off horizontally, thus zero vertical velocity, and landed on the same level, time of all flights are all equal.
A=B=C=D.
Thank you so much! I can't believe it was that simple... I suppose I should stop over-thinking this stuff.