Multiple Choice
A 3.0-kg and a 2.0-kg cart approach each other on a horizontal air track. They collide and stick together. After the collision their total kinetic energy is 40 J. The speed of their center of mass is:
A) zero
B) 2.8 m/s
C) 4.0 m/s
D) 5.2 m/s
E) 6.3 m/s
Correct Answer:
Verified
Correct Answer:
Verified
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