Question

Two ice skaters are initially at rest. They push off and move in opposite directions. Ice Skater 1 has a mass of 90 kg and a velocity of -10 meters per second. Ice Skater 2 has a mass of 105 kg. What is his velocity?

Answer 1

vB = 8.57[m/s]

Step-by-step explanation:

Since there is no external force that generates momentum, the amount of momentum is conserved so you will have the following equation

`m_(A)*v_(A)=m_(B)*v_(B)\\Where:\\m_(A)= 90[kg]\\v_(A)=10[m/s]\\m_(B)=105[kg]\\\\Therefore:\\\\v_(B)=(m_(A)*v_(A))/(m_(B))\\ v_(B)=(90*10)/(105)\\v_(B)=8.57[m/s]`