Two children are facing each other. Child one has mass of 45kg and the other 65 kg. They push off one another and move in opposite directions. What is the ratio of child one's speed to child 2's? Answer choices: a 45:65 b 45:110 c 1:1 d 65:45 e cant tell from this info I don't know where to start, so I'm thinking the answer is e.