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## 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.