52. A 1250-kg car is moving with velocity v = 36.2 + 12.7 m/s. It skids on a frictionless icy patch and collides with a 448-kg hay wagon with velocity v = 13.87 + 10.27 m/s. If the two stay to- gether, what's their velocity? Masses m and 3m approach at the same speed y and undergo a 53. 68. You' factu an in At= where