Two Skaters, Each of Mass 40 Kg, Approach Each Other

Multiple Choice

Two skaters, each of mass 40 kg, approach each other along parallel paths that are separated by a distance of 2 m. Both skaters have a speed of 10 m/s. The first skater carries a 2-m pole that may be considered massless. As he passes the pole, the second skater catches hold of the end. The two skaters then go around in a circle about the center of the pole.
-What is their combined angular momentum about the center of the pole?

A) 2 kg . m²/s
B) 40 kg . m²/s
C) 80 kg . m²/s
D) 400 kg . m²/s
E) 800 kg . m²/s