Question

Two ice skaters stand at rest in the center of an ice rink. When they push off against one another the 45-kg skater acquires a speed of 0.68 m/s. If the speed of the other skater is 0.88 m/s, what is this skater's mass?

Answer 1

mass m = 45 kg

Speed v = 0.68 m/s

another mass M = ?

speed V = 0.88 m/s

We know MV = -mv

                 M = -mv / V

In magnitude M = mv / V

                     = (45x0.68) /0.88

                    = 34.77 kg