Question 3 1 pts This question also refers to the cart with two springs and the two identical spheres. Read carefully because some circumstances have changed. Notice that because the numbers have changed, even a correct numerical answer to question 2 will not be correct for use in this question. In this question, each sphere has a mass of 0.621 kg. and the cart has a mass of 1.05 kg. Cart C and both of the two spheres (A and B} begin with both springs compressed and all objects at rest (as seen from the reference frame of a student standing in the laboratory}. Then the spring on the left is released which sends sphere A flying to the left. Sphere B remains on the cart. After the spring is released. the relative speed of sphere A as viewed from the cart is 6.48 m/s. (Another way of saying this is that after the spring is released, the velocity of the cart is 6.48 m/s to the rightas seen lnthe reference frame ofsphereA.) Then the spring on the right is released which sends sphere B ying to the right. The two springs are identical so again, sphere B will y to the right with a relative speed of 6.48 m/s as measured in the reference frame of cart C l[the reference frame of cart C after it had released sphere A). 5A 4 Again, assume there is no friction between cart C and the track, and assume there are no other horizontal forces acting on the spheres or the cart. In units of meters per second, calculate the nal velocity of cart C after both springs have been released {rst launching sphere A, and then later launching sphere B). Again, we are looking for the velocity as seen by the student who was at rest in the laboratory. The sign, positive or negative of your answer is important. A positive velocity points to the right. (Cilililililililflilit)