A 14.1kg cart travelling at 15km hr collides with a 23.4 kg cart travelling at 11km hr and the carts stick together. Find the final velocity and the amount of kinetic energy lost in the final collision.
M1 V1 + M2 V2 = ( M1 + M2) Vfinal
You do not tell me if V2 is positive or negative, stern ramming or head on collision.
initial ke = (1/2)M1 V1^2 + (1/2)M2 V2^2
final ke = (1/2)(M1+M2) Vfinal^2