Someone has a mass of 100kg and runs at 5m/s to the right. Their sister has a mass of 50kg and runs 7m/s to the left. What is their combined total momentum? Show your working.
Total momentum = mass x velocity
Person 1: 100kg x 5m/s = 500kgm/s
Person 2: 50kg x -7m/s = -350kgm/s
Combined total momentum = 500kgm/s + (-350kgm/s) = 150kgm/s