A 400 Kg Mass Is Moving at 4

Multiple Choice

A 4.00 kg mass is moving at 4.00 m/s 45.0 degrees NORTH of WEST and a 6.00 kg mass is moving at 3.00 m/s 30.0 degrees SOUTH of EAST. Find the velocity of the center of mass, letting (a) = the east-west component, and (b) = the north-south component.

A) a = 0.427 m/s, b = 2.31 m/s.
B) a = 1.23 m/s, b = 0.231 m/s.
C) a = 0.427 m/s, b = 0.231 m/s.
D) a = 1.73 m/s, b = 1.43 m/s.
E) a = 0.427 m/s, b = 0.213 m/s.