Hotdogfingernailsgo Hotdogfingernailsgo Physics Answered three carts of masses 2 kg, 18 kg, and 9 kg move on a frictionless horizontal track with speeds of 10m/s, 8m/s, and 2m/s. the carts stick together after colliding. find the final velocity of the three carts. answer in units of m/s.