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A block of mass 10.0 kg is moving east at 2.0 m/s and another block, of mass 4.0 kg is moving
north at 4.0 m/s. The velocity of the center of mass of this two-block system is
2.0 m/s at an angle of 51 degrees south of east
1.8 m/s at an angle of 39 degrees north of east
6.0 m/s at an angle of 51 degrees west of north
1.8 m/s at an angle of 39 degrees east of north
2.0 m/s due west

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