1. (10 points) A collision occurs between a 6 kg object traveling with ði = (-3î – 2ſ) m/s and 2 kg object traveling with ū2 = (5î — 4ſ) m/s. After the collision, objects stick and move together. What is their common velocity in unit vector notation? Answer: (-î – 2.5ſ) m/s 2. (10 points) An impulse of ) = 6î + 12ſ (kg.m/s) is applied to an object of mass 2 kg, moving with an initial velocity of V; = 3î – 4Ř. Find the final velocity of the object. Answer: (6î + 6ị – 4Â) m/s VA = 5 m/s 3. (10 points) A ball with mass ma is traveling at a speed of VA. After head-on collision, it sticks to a second ball with mass mb traveling at a speed of up in the opposite direction. What is their common speed immediately after the collision? Ug = 3 m/s B A ma = 4 kg mg = 6 kg Answer: 0.2 m/s (II) A B