Two Skaters,both of Mass 75 Kg,are Initially at Rest on Skates

question 19

Multiple Choice

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
• B) 0.04 m/s,moving apart
• C) 0.08 m/s,moving towards each other
• D) 0.04 m/s,moving towards each other