Two carts with masses of 18.0 kg and 2.5 kg, respectively, move in opposite directions on a frictionless horizontal track with speeds of 8.0 m/s and 3.0 m/s, respectively. The carts stick together after colliding head-on. What is the final speed of the two carts. ___m/s

potential energy is directly proportional to height.

more height = more potential energy.

greatest increase in height = greatest increase in potential energy

where are the points with the greatest increase in height ?

has to be c-e or d-e .

are there answer choices to this question? this seems like a question where you have options to choose from.