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Two skaters collide and grab on to each
other on frictionless ice. One of them, of
mass 70.0 kg, is moving to the right at 4.00
m/s, while the other, of mass 65.0 kg, is
moving to the left at 2.50 m/s. What are the
magnitude and direction of the velocity of
these skaters just after they collide?

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