a 92-kg fullback, running at 5.0 m/s,attempts to dive directlyacross the goal line for a touchdown. Just as he reaches the line,he is met head-on in midair by two 75-kg linebackers both moving inthe direction opposite the fullback. one is moving at 2.0 m/s, theother at 4.0 m/s. they all become entangled into one mass.
a) what is their velocity after the collision?
b) does the fullback score?