Inelastic Collisions: A 2.0-kg mass moving at 5.0 m/s suddenly collides head-on with a 3.0-kg mass at rest. If the collision is perfectly inelastic, what is the speed of the masses just after the collision?
A. 10 m/s
B. 2.5 m/s
C. 2.0 m/s
D. 0 m/s, since the collision is inelastic
Answer: C
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