During a crash test, a truck of mass 1433 kg was driving at 12 m/s when it crashed into a stationary car with mass 862 kg. The truck and car stick together after the collision. How fast is the stuck-together car and truck going after the crash?

22. the top of a cliff is located a distance h above the ground. at a distance h/2 there is a branch that juts out from the side of the cliff, and on this branch a bird's nest is located. two children throw stones at the nest with the same initial speed, one stone straight downward from the top of the cliff and the other stone straight upward from the ground. in the absence of air resistance, which stone hits the nest in the least amount of time?