Which jet stream affects weather in antarctica? a. the northern subtropical jet stream b. the southern subtropical jet stream c. the northern midlatitude jet stream d. the southern midlatitude jet stream

Abumper car with a mass of 250 kg is traveling at a speed of 4 m/s. this bumper car collides and sticks to a second bumper car with a mass of 250 kg, which is initially at rest. what is the final speed of these two bumper cars after the collision, assuming they remain stuck together?