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4. Two objects with the same mass move along a straight line in
opposite direction as shown in the figure below. If the velocity of object
2 after the collision (v2') is 5 m/s rightward, then what is the magnitude
of the velocity of the object 1 after the collision.
(1)
(2)
V, = 8 m.s
V3 = 10 m.s

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