IWO BOXCARS, HEAD ON COLLISION You have two boxcars of unequal mass. Boxcar X has a mass my = 10000 kg, while Boxcar 7 has a mass m7 = 13000 kg. They also have unequal speeds and they are heading in opposite directions for head on collision. Using a - sign to signify leftward motion in this diagram, Boxcar 7 has velocity v,= 1.1, and Boxcar X has velocity v y= 1.5. After collision, the two boxcars hook m m together and move off together in the same direction at new velocity v seconds before they hit the final velocity together. TASKS: (a) Calculate the new velocity, v7, using a - sign to signify leftward motion if necessary; (b) Their interaction time is 0.07 calculate the interaction force vector on Boxcar X, F7 on x.