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A ball of mass 0.191 kg with a velocity of 1.45 î m/s meets a ball of mass 0.301 kg with a velocity of -0.398 î m/s in a head-on, elastic collision,
(a) Find their velocities after the collision.
m/s
m/s
(b) Find the velocity of their center of mass before and after the collision.
V cm, before =
m/s
V em, after =
m/s

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