Two skaters, both of mass 75 kg, are initially at rest on skates on a frictionless ice pond. One skater throws a 0.3-kg ball at 10 m/s to his friend, who catches it and throws it back at 10 m/s. When the first skater has caught the returned ball, what is the velocity of each of the two skaters?
a. 0.08 m/s, moving apart
c. 0.08 m/s, moving towards each other
b. 0.04 m/s, moving apart
d. 0.04 m/s, moving towards each other
A
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