Two Automobiles Traveling at Right Angles to Each Other Collide

Multiple Choice

Two automobiles traveling at right angles to each other collide and stick together. Car A has a mass of 1200 kg and had a speed of 25 m/s before the collision. Car B has a mass of 1600 kg. The skid marks show that, immediately after the collision, the wreckage was moving in a direction making an angle of 40° with the original direction of car A. What was the speed of car B before the collision?

A) 16 m/s
B) 18 m/s
C) 11 m/s
D) 21 m/s
E) 14 m/s