(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
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
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.