Cart A has a fan that exerts a constant force F on it. Cart B has a stronger fan that exerts a constant force 2F on it. Starting from rest, cart A travels down a track of length 3*d, while cart B travels down a track of length 2*d. Which cart has more kinetic energy (or do they have the same kinetic energy} at the end of its track? Assume friction and drag forces are negligible. Explain your answer: no credit is given for answers with incorrect explanations. Do NOT use the equation K = 1 . . Emvz In your answer. (4 points) In the situation above, cart B is made of a super dense material and has a very large mass. Cart A has a very small mass. The forces are as described above. Which cart will have more momentum (or do they have the same momentum) when it reaches the end of its track? Explain your answer: no credit is given for answers with incorrect explanations. Do NOT use the equation p = mv in your answer. (4 points}