Problem 2. For a movie scene, a 75-kg stunt man drops from a tree onto 50-kg sled that is moving on a frozen lake with a velocity of 10m toward the shore. a) What is the speed of the sled after the stunt man is on board? b) If a 95-kg skater does not see the sled on time and rams into it with a speed of 8.5m at a 90 angle, calculate their velocity after the collision assuming they all stay entangled together