3.1 Consider two carts on the air track, Cart A with mass 1 kg and Cart B with 3 kg. Each has a perfectly elastic “bumper" so that when they collide we can consider their interaction to be elastic. Say Cart A approaches from the left with initial velocity of 4 m/s eastward, and Cart B (which starts to the right of Cart A) has an initial velocity of 2 m/s westward. They approach and collide head-on. a) Find the final velocity of both carts, after the collision. b) In doing the math for part a), you should end up with 2 sets of answers. Think about what both possibilities physically represent. Use (that will be your "answer" to part a)) and also a few words to explain what the other set of values means (i.e. justify rejecting them). few words to argue for which set of answers makes sense here

3.1 Consider two carts on the air track, Cart A with mass 1 kg and Cart B with 3 kg. Each has a perfectly elastic “bumper" so that when they collide we can consider their interaction to be elastic. Say Cart A approaches from the left with initial velocity of 4 m/s eastward, and Cart B (which starts to the right of Cart A) has an initial velocity of 2 m/s westward. They approach and collide head-on. a) Find the final velocity of both carts, after the collision. b) In doing the math for part a), you should end up with 2 sets of answers. Think about what both possibilities physically represent. Use (that will be your "answer" to part a)) and also a few words to explain what the other set of values means (i.e. justify rejecting them). few words to argue for which set of answers makes sense here