Two people on ice skates are initially at rest while facing one another. One person has a mass of 60 kg and the other 40 kg. They push off each other and move in opposite directions. If the 60-kg skater moves with a speed of 2.0 m/s, what is the speed of the 40-kg skater, assuming no external forces are acting?
sm
a. 1.0 sm b. 2.0 sm c. 3.0 sm d. 4.0 sm e. 5.0 sm