A 4.00 kg object is moving at 5.00 m/s EAST. It strikes a 6.00 kg object that is at rest. The objects undergo an elastic collision. The velocity of the 4.00 kg object after the collision is at an angle of 30.0 degrees SOUTH of EAST. The speed of the 4.00 kg mass after the collision is
A) 5.78 m/s.
B) 4.56 m/s.
C) 3.55 m/s.
D) 1.67 m/s.
E) 2.66 m/s.

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The Answer of A 4.00 kg object is moving at 5.00 m/s EAST. It strikes a 6.00 kg object that is at rest. The objects undergo an elastic collision. The velocity of the 4.00 kg object after the collision is at an angle of 30.0 degrees SOUTH of EAST. The speed of the 4.00 kg mass after the collision is
A) 5.78 m/s.
B) 4.56 m/s.
C) 3.55 m/s.
D) 1.67 m/s.
E) 2.66 m/s.

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