Q4. As shown in the image below, the freight cars A and Bare approaching each other, and they have a mass of mA = 20 Mg and mB = 15 Mg, respectively. The directions of their initial velocities are shown in the image, and the speeds are vA,1 = 4.3 m/s and vB,1 = 1.2 m/s. If the two cars collide and get stuck together, then move with the same velocity, determine their common velocity after the collision. Right is considered the positive direction and negative sign must be included if they move to the left after the collision. Please pay attention: the numbers may change since they are randomized. Your answer must include 3 places after the decimal point, and proper Sl unit. VA,1 VB,1 A В Your Answer: Answer units

Q4. As shown in the image below, the freight cars A and Bare approaching each other, and they have a mass of mA = 20 Mg and mB = 15 Mg, respectively. The directions of their initial velocities are shown in the image, and the speeds are vA,1 = 4.3 m/s and vB,1 = 1.2 m/s. If the two cars collide and get stuck together, then move with the same velocity, determine their common velocity after the collision. Right is considered the positive direction and negative sign must be included if they move to the left after the collision. Please pay attention: the numbers may change since they are randomized. Your answer must include 3 places after the decimal point, and proper Sl unit. VA,1 VB,1 A В Your Answer: Answer units