1. The problem statement, all variables and given/known data (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 2. Relevant 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 3. 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.